I registered to this one, decided to give it a go without hesitation.
I did not read the TOS, the registration was over in a few seconds.
Immediately loaded my account with 500,000 bits. It appeared in about 5 minutes and I started using it.
Sent 10k and 5k to my friends without asking their approval. One without public note, and the other with a wall post.
Fee is a very reasonable 100 bits (0.1m
BTC = standard network fee) regardless of the amount.
There is no transaction history, which is a big minus.
I am interested what happens if the recipients reject the transaction.
I don't yet know anything about the technology.
TL;DR: WOW - this app alone is boosting Bitcoin price by $100+ in the remainder of 2014 
I have now sent to about 15 friends. One of my friends does not show up in the friends list and the "search" also does not find him. What's funny, he can send to me without problems.
Some of the transfers are experiencing delays.
Transaction history is still the most needed feature.