How does the Velcro perform when your pants aren't buttoned?
One of the things I like about the clips is the support they provide to the holster against the belt when getting dressed or using the facilities.
I've been very impressed and pleased with my Supertuck for my Taurus PT145.
If the Velco is stable enough, it would be nice to have as another option.
The velcro provides a bit less support than the clips. With sturdy pants (I usually wear jeans or 5.11 casual pants, the ones with hidden pockets) the velcro works fairly well however. The holster is still secured at four points: two on the belt, two on the pants.
The bigger issue is tucking your shirt back in. It is a bit of a pain to get bloused out properly and to tuck in around the holster. It is also tough to verify that things look right without a mirror. So you might find yourself finishing your business, doing the best tuck you can, ducking out to check your look out in the washroom mirror, then having to subtly adjust out there (or duck back into a stall for more extensive adjustments).