3. It takes forever to download it, which puts off new users.
The first monthly "State of Bitcoin" summary coming from project developer Gavin Andresen ( 13 Oct 15:32 )
http://bit.ly/plkp7Dexcerpt:
Network stability and wallet security are still my top concerns; start-up experience for new users
(the long wait to download the block chain) is next on my list.