Being a freelancer, G-Sites has been a good hub for smaller projects ( =5 team members, =3 months duration) for some years now. It offers adequate page layouts for most content and links nicely to other Google tools such as (project and member calendars, drive, groups, docs, picasa, maps, ...) . It's not the bees-knees and commercial sites do offer more (especially related to project management) but there is no cost and most everyone has a Google account (or can sign up for one). The pro-Google Sites argument reminds a bit of MS Office of yesteryear, where the individual applications were often weaker than their counterparts on the market but the tighter integration of the individual apps were the key selling point. Google Drive has also been a nice addition and if Google Docs ever gets feature-rich enough to use for more complex work, then I could begin moving away from MS-Office (at least in part).

Max
Frankfurt, Germany