Great product. Yes, the addition of the lock button makes it slightly less user friendly, but I have kids so I appreciate it. The blades are really sharp and forcing you to put both hands at the top is a good safety feature.
I had the V2 and opted for the GPS watch, then came back to the laser finder. I decided to get the Bushnell V3 without slope since that feature isn't allowed in a lot of tournaments. Looks a lot like the V2 basically, which is why you don't see many of those for sale on eBay. This works just as well and is much more accurate than the GPS solutions.