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.
In addition to the speed of transactions that begin to slow down, the fee will also be greater. I do not know why the fees get bigger. Currently with a fee of 10k satoshi. You will receive a confirmation maybe a few days
Probably the traffic is become higher because of the increasing of bitcoin user. My transaction usually confirmed in 10 - 30 minute. I never see the transaction that need a few days to confirmed. I hope there are enginer or developer that can solve this problem.