I use BlackVPN USA account from Europe and have mixed experience - it works good to listen to radio on Last.FM, but is sometimes laggy on Hulu. Also, their support team is quite nice - initially i accidentally got NL account instead of US and asked them to switch to US account, they did the switch seamlessly for me. So, overally, speed could be a bit better but the price/service is good.
BlackVPN – VPN consumer review – 13064