I have strategy runner with global futures, I also have an account with IB too. I like IB better than SR. Good thing with IB is every thing is on one page, there are no child windows such as in SR you will have to open child window to place your orders. I only use manual order entry part of it and don't use strategy part.
I never had trouble with IB except previous two occasions one at last fed meeting and second is yesterday after greenspan finished, IB lost ebot feed.
The reason I trade with global futures is that they offers 500 dollar margin for emini sp, while IB requires 2000.
Cost of trading with SR is higher. Mine is 7:50 round turn per contract and IB charges 2:40 and IB potentially going down beginning this march.
You can try SR for two weeks to see if you like it.