I for one (there are not to many of us) like saildrive. There are several reasons. 1. It is always on the very bottom of the boat near the keel. Not near the stern like standard inboard, not hanging off the transom like an outboard. 2. It take up ALOT less space. No drive shaft, the area aft of the power head is open for storage. 3. The vibration is alot lower than on most inboard mounted auxs. 4. The boat is usually easier to control under power.
Now the drawbacks as I see them. 1. Maintanance is a must. The tail (transmission) must be serveried seasonally (if you don''t you wish you''ll had). If you don''t use a folding prop your preformance is effected. And the Biggest of all drawbacks ... OMC ...
Saildrive is an old idea now being used more and more in new boats it really isn''t a bad way to go