We opted for Swedish finish because it is supposedly one of the most durable and resistant to scratches and other damage=great because we have two dogs. We stopped by Tuesday after work prior to staying at our friend's house for 4 nights (super generous) and man, even with holding his breath, Steve got a headache and his eyes stung just being inside for a couple minutes. I could smell the fumes from outside. However, we moved back in Sat morning (are living upstairs for the week because the floors need to "cure" for a week before they have furniture on them and will only handle socked feet) and love looking at the floors. Here are some pictures of before (wow, it was worse than I thought), when sanded and after. There are white oak floors (rare size so very difficult to find the wood for patching) in the living and dining rooms and fir in the bedrooms and hallway (we had matching fir planks we had pulled out from the basement that we used for patching).
Floor Before (oak)
Sanding in dining and living rooms (can sort of see patched area in upper left hand corner)
Fir floors patches and sanding started
Done and beautiful! All stains and divots from prior refinishing gone.