Mike Dyson - a gentleman and an excellent instructor.
Leeds were very good. When I was there it was 25hrs sim and 25 a/c which was much more useful than the usual 35/15 split. Also being able to use the sim when it's empty for free is very worthwhile.
Downsides - my main problem was only having one a/c, but that seems to have been rectified. It is getting towards the bad time of year for non de iced airplanes but even if you were in a de iced Duchess I doubt you ( or your instructor) would want to go fling into known icing. (As an aside is the Duchess certified for FIKI?)
But overall I would recommend them. They did a good job for me.