I just returned from Madison, South Dakota (just north of Sioux Falls) where I did recurrent training with Riggin Flight Service.
https://rigginflightservice.com/ I did my multi with them and liked their down to earth, straightforward approach. They don't load you down with a lot of distracting information and focus on the main skills. It was worth it to me to fly commercially there and back for two days of training.
We flew in an Apache. The Apache is a good multi training airplane in that it's not a turbo, and it's about as simple as you can get in order to focus on the pilot skills. My interests were mainly in the Emergencies - I.e., single engine identify, verify, fix or feather. We ran through that repeatedly. This is the skillset that one would need from muscle memory if/when it happens for real.
Ideally, training in my own airplane would be preferable. Since that's what I fly and we have counter rotating props (which the Apache does not). So the VMC demo and single engine controls are a little different. But I'm not going to put my engines through that abuse of constant chopping power and re-upping it, and even the engine-in-flight shut downs. Leave that to a school plane.
Most schools who do have Senecas have I's or II's. To those of you who have experience doing multi training in a Seneca, (or if you are a school that does it), how big of a deal is managing the turbo while doing the training? Does anyone know of a school that does multi training in a III, IV or V ?
Next time around, I may try to do it in a Seneca (although the folks at Riggin really have the process nailed and it was a pleasure working with them).