I'm mining and trading IPBC - never had any problems with sending or receiving (except livecoin sometimes have their wallet offline, but it is obviously their problem). I'm using linux version of the wallet, it's stable and easy to use, for mass adoption default on switch to use external node would not hurt, ability to switch off "bring to front" when receiving transfer for miners like me, also you could integrate bit.tube page into the wallet.
Question for devs - are you going to release sources of bit.tube, to allow competing ipbc based services? That would ensure ipbc success, in my opinion.