Love having a dedicated backup device on the network which is seamless.
Really not impressed that you can't use it to extend a wireless network with a non-Apple compatible product, at least without having to use an ethernet cable. Now Time Capsule has to live beside my router, negating any wifi usefulness.
Beware that you cannot stack anything under or ontop ofthis unit as it runs incredibly HOT. I had my Mac Mini under the Tme Capsule and the mini started having problems due to the heat generated by the TimeCapsule. They were both sitting out in the open on a desk - good air flow all around. No fan for cooling the TimeCapsule means it is quiet but can cook eggs on top.
The device is as good as a mid-range wireless base station. Having the built-in Time Machine backup drive is the big deal, though. Highly recommended for Macbooks/iMacs to have a wireless backup source.