First of all, I am sorry to hear about your training experience here at Sheble's, jacquesru. It does not please me when my customers get upset and it isn't because of the money, hell, I'm not the owner. It makes me upset because we have been reliant on word-of-mouth advertising for the past 45 years and when we blow it with one customer, we lose many more. So I am sencerely apologetic.
As far as the training of Sheble's, we will get a Multi Add-on complete in two days. And it will be for the posted price of $2,575.00 (Not including the examiner). It's hard to use the word guanentee anymore, but we used to. With weather and maintanance issues, the worst that I have ever heard someone being off schedule was four days total, from his arrival to his certificate because the weather pretty much shut us down for two days.
Showing up prepared can't hurt, but as far as was mentioned above, the AMEL add-on has very little as far as oral material. Most of it is systems in the airplane and the rest is aerodynamics specific to the multi-engine. All together maybe two hours of ground that you will need to study that night. It isn't too bad at all.
For those of you that see that I work for Sheble's and are worried that my opinion may be biased, you would be mistaken. I was first as student of Sheble's back in 2005 when I picked up my AMEL add-on, CFI, CFII, and MEI after a time build in the BE-95. I was pleased enough with my training to apply to work here and moved to Arizona. It isn't for everybody, but our accelerated school is as thourough as the PTS requires and is geared directly to the PTS.
If anyone has any questions about our programs, they can call me at 1-800-249-6482 and I will be happy to talk to them and answer their questions.