Update: Watch keeping great time, no change in my review, but I can say with 99% certainty that the crystal is acrylic plastic, not glass. They must have changed this over at some point. I test using a very sharp knife with fine tip, etched a 1mm or so scratch with almost no pressure. So, they need to reflect this in the product description, it states mineral glass last I read for this MRW200 line. I have a 2nd one on the way, I'll check that one, different color model.

The Casio MRW-200 line is pretty slick....for under $20 typically....Casio is doing a service to the consumer in my opinion really. You are getting their standard quality, decent movement that is accurate, and some style. The 100 Meter water resist is a definite nice to have, and I think is the real reason to buy this as a budget watch over many other options. I have given 2 as gifts now, one mans, and one womans....then I sprung for this white strap/ black bezel/ black face version....which add something different to my small collection - the white and black contrast with the splash of red on the bezel looks sporty and cool - the strap keeper/ loop for the excess band - on this white watch, is black - making a unique contrast for the white version, I think this is the coolest one This is a great tropical vacation or general travel watch, maybe even a perfect choice for that. You lose it, break it, get it stolen...have to hand it over to a machete wielding thief in a third world country - no loss! Buy another one. Honestly, I would say, buy 2 or 3 now, in different colors while they still make a good selection of colors in this model....Casio changes their offerings all of the time, you never know when they will go away, or replace the model with something that costs more. You can fit an 18mm Nato Strap on these watches, I have not done it...but is supposed to be possible...I will buy another one in Black and throw it on a solid black Nato to check it out..read up on the Nato thing before doing it....on watch forums etc to see what other do and how they do it, again, I have not done it yet, not sure if any mods or required, but its supposed to be a tight fit as the watch wasn't precisely intended for this. Anyways, I will add to this review if anything goes wrong with the watch...but its kept time perfectly to my Casio 5610 Atomic Radio watch now for over 24 hrs....so the claim that the watch should be +/- 30 seconds a month or so is likely true.

Features:
Rotating Bezel - 2 ways - no clicks....but this is fine - with this watch - a rotating bezel is not for diving - its to track things you do on a daily basis - kind of a visual alarm if you will, or timer, just keep track of the little things - this is handy when traveling, in airports etc.

Day AND Date - both are represented. Understand how to set it - turn the crown one way for day and the other for date - at the half click crown setting - pull the crown all the way out for the time. What I do - is set the day/ date for the day before when setting - then set the time and have the day and date click over to the current day/ date that way - some people don't figure little things like this out and freak out, to return the product - read reviews where people couldn't figure out how to set the day and date - thats the easy way.

100 Meters - solid for this price point - should be able to swim and get wet, maybe some snorkeling.

Lume - not excellent but works in the dark - just charge the lume before bed with a bright light/ flashlight/ lamp etc....should be able to see the time in the pitch dark thru the night well enough - again - $20, you are not going to get $500 Seiko diver performance - its adequate and functional - just like most Casio products. I tested it - its good enough - no complaining.

Size - the size is cool - not too big - not too small - its 43mm stated currently - I believe its close to that or 42mm. I pictured the watch against a 44mm Casio MDV, and the massive 46mm Marathon JSAR aka LGP....you won't feel like you are wearing a whimpy watch I don't think, unless you are a 350 lb guy with tree trunk arms.....I am not small, and I think this watch looks cool, big enough to be a mans watch, but not stupidly large, its efficiently sized, kind of a classic design, well done by Casio.

Get 2 or 3 at the sub $20 price - you should enjoy these Casio's, they are a good value and are sized well for those who enjoy a practical well made product. Its the kind of watch that if you really don't want to spend money on watches, this one watch should be good for most things, If I had only this model - maybe one black version and this white one - I would be ok with that, there is not much else you need - Casio provides so many good options, this is another product of theirs that gets most things right. This may even be their best overall, do anything watch, for under $30, let alone being able to get it for close to $15....in fact the only other watches I would get for under $50 for sure besides this one for under $20 would be the MDV-106 or as a digital watch, the GW5600 classic square G Shock....for my purposes and tastes anyways. In fact - those 3 watches, would be a perfect mans Casio collection - having all 3 of them for under $100 total, not including strap upgrades for the MDV-106.

Update - after owning the watch for one week - it is exact to my Atomic time Casio which is updated nightly automatically with the exact time - so, this sub $20 watch is on track to be +/- 5 seconds in a month? Who knows, maybe better ....this is very good performance for this price. My Swiss Quartz Marathon has lost 2+ seconds in that same week, as I set them to Atomic time on the same day.....so.....this little watch kicks ass pretty much. I will buy one or two more and mess with the nato strap combos for fun..