I bought one of these in 2006 as a wallet I could put inside a diving suit and get abused.  It has stood being submerged in water for days, hot sun and covered in dirt.  As its all metal its easy to clean, just dunk it in water; cards and money survive getting soiled easily.  This is my second clip, as the first was stolen last month.

Pros

Compact, durable design and finish, very little to go wrong

Cons
The rear edge of the credit card section is not as blunt as it could be, and in the right angles and wrong type of pants, you can feel it jab you, but this is rare.

The current version of this wallet is updated, and is not like the picture. Its over all smaller & narrower and the clip is far tighter than the original.  The older clip design relaxed after years of use, but you can easily 'tighten' its grip by just folding your money 2x, so it appears thicker; as you add more money to it, just unfold the 2x folded back to 1x; you can do this quickly and easily.

Smart Money's credit card section squeezes the card on its ends to hold it tight.  Compared to other clips, this design is superior.  My prior experiences with the traditional single clip money clips hold money well but the clip also puts pressure on credit cards, and over time could deform embossed characters on the card or scratch the magnetic strip.  The 'other' clip design with 2 clips back to back will do the same thing as the single clip design.  The Smart Money credit card section leaves the sensitive areas of the credit card untouched.

While one cannot tell the finish will survive after years, mine did, and the quality of the new version looks even better.  But, I'm not in for the finish, but for the clip's capacity to hold what I need held safely and securely without bulk.