Based on my own experience, I would recommend considering AFT at Exeter.
I can only reiterate what has already been said. It's a small, friendly school, you get to fly the BE76 Duchess on the MEIR course (much nicer handling qualities then the Seneca), and Exeter Airport is busy enough to be interesting and to give a realistic commercial setting. You pay for the basic MEIR course at the end of your 50 or 55 hours course, with no initial payment or interim payments required. If you require additional training, you pay the outstanding amount when you leave.
I can't think of any negatives. The instructors are very experienced, ex-airline and/or military, and include ex-BA, Virgin and Cathay captains. Exeter ATC|are usually most helpful. The airport has ILS and NDB approaches, and an ATIS. One of the CAA IR examiners is resident. Students sometimes include a high percentage of RAF or Navy aircrew undergoing conversion courses, who can sometimes appear incredibly confident and self-assured to a civvy student!
Why not pay them a visit?