This stuff is so good that I cannot say enough about it! Again, it has saved me from dozens of hours of tedious hand-cleaning for several hundred of my hand-crafted, jewelry pieces while readying them for sale in multiple upcoming fall craft-fairs... Because I didn't want to do the spring or summer craft-fair circuit, several of my sterling silver pieces had "sat around" for months in their open-air display boards & cases where they became extremely tarnished and would have literally taken me no less than an entire week (or more) to hand polish them all back to their original beauty... Instead, yesterday, this product cleaned about 450 sets of earrings, necklaces, and bracelts within a single afternoon and not only did it faster, but did it FAR BETTER than hand-cleaning ever could besides!

Pros:

1- It is FAST... I typically put 1 necklace or up to 4 earrings in together for about a count of 10 seconds... I suspect that it didn't need even "that long" to do the entire job because I pulled one out after only 2 seconds thinking I'd dropped in something else-- it was already tarnish-free! That's how FAST and how effective it is!

2- It works on even silver plate... I don't use a lot of silver plated metal in my designs, but I do use it for "price-point" designs to be able to offer some items at a lower price for those who love the designs but not the price tag of my higher-end pieces.  Plated silver tarnishes the same as Sterling & fine silver so it must be cleaned sometimes too.  The "normal way of cleaning plated pieces is by using the (terrific) polishing cloths and polishing the tarnish away... This method, however, reduces the life of a plated item significantly because to remove tarnish, it also rubs off some of the plating while cleaning it.  So this is an amazing product because not only is it suitable for plated metal, but it actually works without reducing the "life" of the plated item... (yes, I tested it out by deliberately tarnishing and then cleaning a particular item I sell repeatedly to see how LONG it would stand up... It's been 35 cleanings and I cannot see any noticeable removal of the plating !!

3-  It can be used on copper, silver, plated metal, brass and even jeweler's bronze!

4 - It appears to be safe on Swarovski crystals, Czech & regular glass, natural stone, fancy finishes including the "stardust" sometimes put onto silver beads. I would NOT use it on pearls, opals, or any delicate, porous stone-- the jar clearly says NOT TO and it would likely harm it.

5- It is cheap enough to use all the time, even for someone like me who needs it for thousands of pieces of jewelry & metal jewelry supplies on a regular basis.

6- It did NOT harm the glossy finish on my natural oak table when spilled on it.

7- It did not stain a white, cotton towel used with it.

8- It did not damage an artist's quality sheet of high-end, matting board when dripped all over it off of vinyl gloves... (it was diluted with water--- I cleaned it up quickly--  but there's no sign of any damage to the matting from the experience)

9- It rinses off quickly in water...

10- NO rubbing required at all!

11- There was no degree of tarnish that it did not immediately remove!

12- The 8 fluid ounce jar is likely enough to last for several years for the average person...

Cons:

1- Once opened, the jar tends to leak a little if not closed VERY tightly (but then again, ALL of this type of product tend to do that... Make sure to remove ALL of the plastic seal from the edge of the jar so that the cover can reseal itself without any leftover plastic causing gaps that might allow a tiny bit of leakage if tipped over accidentally... (Learned THAT the hard way!)

2- The only other con I can think of is that the label says that you shouldn't use for "factory-antiqued" metals or it **might** take off the antiquing process... However, it's not really a "con" as THAT is really a given since antiquing is usually the process of deliberately tarnishing an item, which this is MADE to remove...

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NOTE:

*** However, for my own benefit, as I'm apt to accidentally toss something in that shouldn't be in without thinking, I wanted to know what might happen if I used it on one of them... So, to test it, I did an experiment with one item that was created from factory-antiqued copper with what I presume is a "permanent antiquing process (vs just being allowed to rapidly tarnish naturally)... I dropped it in for the usual time (about 10 seconds) and it did NOT remove the factory antiquing at all... It shined it up, but left it with ALL of the antiquing it came with.  So, it IS safe to use on "factory-antiqued copper" done with a permanent antiquing process, or at least the kind I purchased from FMG... DO NOT assume that means that it will work on your stuff and remember, I ONLY did it with permanently factory-antiqued copper, NOT on silver... and not on an antique piece with NATURAL oxidation antiquing... If you don't want that to be removed, don't use this product for that item!

ADDITIONAL NOTES:

--- Wear vinyl gloves if you have an expensive manicure, that just makes sense!  However, I accidentally tried it without gloves while wearing a set of those "acrylic, stick on French manicure nails" and it did NOT harm them in any way nor affect the glue that holds them on. Not sure if it is safe with salon applied acrylic nails rather than the stick on type, so test it out first! Or just wear vinyl gloves...

--- I always used Connoisseurs brands and liked them, but this is BETTER and FASTER...

--- This product is NOT meant for gold and probably wouldn't hurt diamonds, but it's not made FOR them either... For diamonds and gold, (and very dirty jewelry with built up, gunky stuff between prongs) I'd still reccommend "Connoisseurs jewelry cleansing gel and brush for travel or purse" (in the 5" long, red tube) as it is THE most amazing product for cleaning diamonds, gold, and dirty settings that I've ever used!

--- BUY IT, you won't be sorry... !!  (and NO, I'm not affiliated with the product in ANY shape or form, it's just THAT good... (-;