It really is good and you can actually have multiple large files loaded into it. Not sure how it manages that but very very good.
Just to give you some info, I just opened a csv that's 3.5 GB and has about 1.6 million rows. It took about 30-40 seconds to load nad it's only using 215 MB of ram. I have managed to crash it a few times but I think it's understandable considering the huge amount of data it's dealing with.