Well I have owned an R93 and currently owns R8, so yes I have looked at them once or twice. The reasons I have them are manifold, but partly because I liked the idea that everything is hung off the barrel making it inherently accurate...fewer elements to be misaligned.
If the stock should be badly made...and there is no reason to suppose that it is...the misalignment of the slide may affect the cycling but not the accuracy...the floating bolt head is floating and so will conform to the barrel as usual and thus not introduce any inaccuracy.
Alan