BetOnline offers good live lines as well as a plethora of futures and props wagers but their customer service is absolute garbage.
I just had a Live Chat session with their 'CS Rep', "Milton" which 'he' closed while I was still asking questions. They clearly do not give a sh*t about their clients unlike many of the other Books I use. I also had to contact Covers and SBR a few weeks ago about their sh*tty phone cs.
Buyer beware (yes, I have had a BO acct for several years and have even referred two others who opened accts with them because of me. No Mas, no mas. Their interface is great but that is where it ends. If customer service matters to you, go somewhere else. If it doesn't then go ahead. (I have 8 SB accts and BO is the worst in terms of cs but 2nd in terms of interface.)