I think what people are suggesting in the posts above, is they are very expensive ($10k+ if still available), difficult to install (non reversible?), the mechanism blocks access to removing the front shocks, and their operation is very precise (finicky). The action of the door, is that it opens horizontally initially, then things go up, 2 completely different motions to open the door (not a single motion like a NGT Lamborghini etc). My understanding, is you can force and tweak things out of alignment if you do not get the actions correct, or try to swing past the limits, particularly opening too far horizantally, and coming down too hard when closing. I have been in a car or 2 with them, and it was a counterintuitive process to open the door.
Maybe a member that has them and likes them can correct my comments.