I paid the bought the HotelRunner Channel Manager for 2 years. I was duped in by over 50% discount offered by them. Now I regret that I should have never gone for it. We have repeatedly over booked by Channel Manager, contacted them on all the occasion. We received reply but after 24 to 48 hours latter. They do not have customer service. You can only contact them though Email only. No online chat, no phone number to call only through email. I requested them several occasions to have an online session to explain how we keep the updated inventory but no chance. I even told them that if they do not arrange an online session, I will have no option but to leave them... and you know what- no reply. At last I have no option but to leave them negative feedback here and leave them at half of the contract and I am going for somebody else. I have contacted the guy called Abel at Hotelunner, and always received a standard reply.
Avoid them at all costs if you can.