Yes, I have one. I "upgraded" from a voodoo 3000. I was annoyed by the horrificly slow screenswaps because of the low amount of gfx memory on the voodoo 3000. With the voodoo 5500 My A1200 swaps screens lightningfast, like an amiga should. But to take benefit of the larger amount of gfx memory on the V5500 I had to disable warp3d. I have not experienced the card to be any faster then the V3000, but I think it was worth the change.
