Eh. no, while you "can" work fine in Open/Libre office, it's certainly no replacement for Office.
It's mostly opening documents created with MS Office in OOo/LO or other alternative products, especially Excel documents tend to mess up easily.
I'm curious, aside from what Glassed Silver mentioned, what issues do you have with OOo or Libre? I use Libre every single day at work, more than most people, mostly in Calc (Excel), and I can't say I can recall having a single issue. I believe that it does have quirks, but aside from learning a new UI, I think Libre Office is pretty damn capable. Can't really ever think of a time when I've said "Damn, I wish I just had Office!". I mean this as an honest question because a few years ago I would have definitely agreed, but these days Libre seems to be a decent alternative. A lot of really big companies rely on Libre.