This wallet is great for limiting me in what I carry around.
The quality of the mechanism is good. It only gets stuck if you put awkward sized cards in it or business cards (Which it's not for).
The quality of the leather and stitching is good and well put together.
Ok, then why the 3 star review?
I was an original backer of this venture. Obviously, you pay over the odds at the start, but what I didn't expect to happen was that the item would start to look old within the first 2 weeks of having it. The paint started to come off the parts of the push mechanism and the card holder (both painted metal). So, after the first month it looked like I had owned the wallet for a lot longer. Not what you expect when you pay so much for the item ($120).
So that's one star lost...
Second star is for the tracker.
The tacker has been completely pointless. I used it for the first month and gave up because it was adding bulk and didn't provide any valuable functionality.
I would test the tracker occasionally to see where the last known place it was. Usually when it was on my person. Sometimes the last known place was somewhere I was 8 hours prior. That's pretty poor, so I thought the connection had just died and it couldn't be picked up again. What I then tried was the proximity function, so that it would alert me when I left my wallet behind. This also turned out to be torture. It would continually tell me I had left my wallet behind even when it was directly in front of me at my desk in work.
So the tracker I cannot recommend at all.
To summarise, I like the wallet, it needs a slight tweak, but feel the tracker is a waste. I originally bought it for the tracker functionality. If I were in need to replace the wallet, it would still be a contender, but without the tracker.