They seem very shady to me, i'm going to keep away from them (F rating at sportsbookreview.com) and it seems there is an issue regarding another failed books connection to them.
Sorry, I gave an educated answer that has took studying. Kinda like when you go to a liquor store and they keep getting robbed day in -day out after awhile you begin to think they wont be around long exspecially when there payouts are getting delayed!.