Yes we use RTS & Mercurypay.
Yes the no signature required below a certian limit has always worked for me since day 1. This may have to be set on the credit card server machine and not just the backoffice. Some setting are machine dependant.
Yes I got offers from other credit card processors. I had hard copy quotes from them took them to my mercury pay sales person and cut a deal I could live with. It is up to you to get the deal on CC fees not RTS. I wish RTS would do it for me but that is not how it works.
After looking at the price of other systems RTS normally wins. Since you do not have to buy hardware from them it is really a plus.
You might also check on the forms with other users. this is a great tool for solving some of those issues that bug you but you just can't fix.
www.boards.rts-solutions.com/eve/forums
[This message has been edited by dsschoenborn (edited July 17, 2007).]