Safari at O'Reilly books?

[Nancy Allison]

Is anyone using Safari Library or Safari Bookshelf? Are you happy with it?

If you don't know what I'm talking about, it's online access to many recent technical books. (Link: http://safari.oreilly.com/search)

Although O'Reilly is in the communication business, I cannot get a clear idea from their writeup of what the cheaper option, Bookshelf, gives me. I assume it means that I can have complete access to ten books at a time.

Any experiences with this, I'd like to hear about them. I *think* it sounds great  -- at $20 per month, far, far cheaper than my usual outlay for technical books.

--Nancy