I am not satisfied with the too long speed of operations. It's still bad that you can not use your coins without the Internet.
You are right, but I think internet is mostly everywhere in the whole world. So internet problem can be solved and you can control your bitcoin without any problem.
I think the only disadvantage about bitcoin is the delay of transactions confirmations. If they fix that, it will be awesome. I think paying high fees is not neccesary if they update the blockchain.