I've got a ThunderWear, which is the original the SmartCarry was modeled after.
It stays in the drawer almost all the time. My main complaints are that it requires at least a quick release waistband to get to your gun, and it requires two hands as well.
Just as personal preference, having a gun under your pants over your bladder takes some getting used to. I find it uncomfortable, especially when sitting.
Finally, my CCW draw method is to stealthily bring my gun into the confrontation instead of doing a bit of a spastic dance to get to it much less draw it.
In fairness to the design, my mode of dress isn't optimal for the holster, and I'm not willing to accomodate it accordingly.
YMMV