Adjustable height and cant holsters must have extra real estate to provide those adjustments. That makes the holster bigger and heavier. If you don't yet know what you really need, it's a start, but a holster with the ride height and cant you actually end up settling on will be more compact and therefore also more comfortable.

The clip draw is an unsafe gimmick. The gun is exposed to body sweat; it is not very stable; it is uncomfortable; rides too low and most importantly, the trigger is always uncovered and susceptible to an unintended discharge. Bad idea, IMO.