My first tire was the MPA. Note: I had Traxxxion Ak-20 cartridges installed along with springs within 1000 miles of being triked. I found the MPA buzzy and in the Arkansas twisties it wanted to "skitter" when pushed thru a hard turn. Same for the BT-45 I used next. Both tires rode very hard and I could feel every little fault in the road surface. I used BT-45's until I purchased my first Avon Cobra Trike.
The difference was night and day. The front felt planted in all situations, rode much smoother, and holds a line thru a hard twisty like it is glued to the road. Will never use anything else unless someone comes up with a better mousetrap.
Keep in mind that here where I live we scrub front tires off quickly with average mileage only 11-13k miles if we stay local. That applies to all tires; MPA, BT-45 and Avon Cobra Trike. I understand that in flat country these tires are running 20-30k miles routinely. However, I'll give up the mileage for living and riding where I do every day. YMMV