This has been a really impressive performing mech. Outstanding build quality for the price. The constant contact switch can be used with either a spring or magnets, with both options included. I prefer the feel of the spring, but it's great to have the magnet option. Smooth button action. Since it's a telescoping body, it works with 20650, 20700, or 21700 without an adapter; also can use an 18650 with an adapter (included). Very smooth threading.

The only con is that it's not all that special in terms of looks. But, if you care more about performance than looks, I can't think of another mech for this price (about $20) that performs nearly as well. Going to be picking up a second one for sure.