Our company is round 500-strong and have also switched to google apps. Fine for spreadsheets, unless you need advanced math function and graphs, but a big led-down on he word processing front, and it's impossible to issue with the degree of professional-looking layout expected from external documents - still massively useful for internal docs, though.
By the way, I think you missed what I thought was fairly obvious sarcasm when I implied 450 new fonts was going to help them corner that much wanted enterprise market. I think G+ needs one new font (comic sans, obviously) to indicate sarcasm.
The collaborative features are a killer, granted, but the lack of change tracking and in-line comments that even Open-source alternative to office use render it useless for document going through a structured revision process.
I'm not saying it's all rubbish, just that it's based on the axiom, admittedly not far from the truth, that a large proportion of docs generated in companies don't need more than the say, 20% of core features of Office, so if you issue a product that does that, but better, then it's fine. And it's true. Once you go past that 20%, it breaks down.
As much as it kills
me to have to admit it, there are figment of truths in the retaliation campaign video made by MS: http://techcrunch.com/2012/02/21/googlighting-microsofts-latest-viral-attack-on-google-docs-video/