Statement one: Given the way I use poses, I have had exactly zero issues with V4 poses on V4WM.

Statement two: I've never seen a pre-made pose that worked out of the box for my purposes.

That said, I find it to be a major time saver to get the pose "sort of" where I want it. Takes far less time to tweak than to make from scratch.

A perfect example of this is a little set of free poses that I created depicting Michael showing affection to Vicky by way of caressing her breasts. These were modeled using native M4/V4. Guess what? They don't line up right if you have reshaped much of anything on either body. But guess what else? They take about two minutes to clean up and get ready to render!

Expecting an out-of-the-box pose to be exactly what you need is like comparing the $9.95 reading glasses you buy at the drug store to a pair your optomitrist made by measuring your refractive issues. It'll get close, but it's NEVER going to be "right."