I'm at SFC on my IR.
Passed my CPL and MEP first time and bang on the min hours. I don't agree with the unexperienced instructor comments at all. Most are and the only two I can think of are PPL instructors. We all have to start somewhere!
I think if you are going to struggle with the CPL course, you'll struggle which ever school you choose.
Yes it's a small airfield but taxing takes no time at all. I completed my PPL and Cranfield and spent up to 20 mins taxing and waiting etc. I think I would crumble if I had to do that on my IR in a twin costing around £5 per min!
Great school, good vibe about the place too. Go visit and decide on what you see. I don't work there either before anyone chucks it in