Hsukaria,
I've had pretty good luck with quite a few engines over the years, including MDS (AKA, More Dead Sticks). I have the 1.48 in the World Models giant scale P-51 and it flys the plane with authority, I don't want to jinx myself but both engines (.45, and 1.48) have run great with no Dead sticks and smooth power. I had heard there were problems with MDS carbs amoung other things but I never seemed to have any problems other people seemed to have, just lucky I guess. Thunder Tiger on the other hand is another story, two broken connecting rods in two separate TT .39 Pros and I will never buy another TT engine product. The helos (Raptor) are great, but the engines, well, lets just say I gave them away right after I rebuilt them. I know there have been others with similiar problems with the TT engines, I'm just too lazy to dig up the thread, (Check the reviews)! To each his own, regarding engine preferances.. Again I digress, this is a discussion about K&B's which I have had pretty good luck with as well.
Steve