I have had two, still have one. I got the one I still have, a .46, at one of the local hobby shops. It's basically a cheap chinese knock-off of an OS. I bought it for a stupid combat plane, but now it's on a Magic.

It won't die, it always runs, therefore I still have it. It puts out about the same power as the .46FX for about $45 less.

However, it ain't much of an engine. The front bearing leaks so much air you cannot shut the engine off with carburetor alone. It blows a little fuel past that front bearing at full throttle. The muffler only goes on w/o leaking when you high-temp silicone between the muffler and the engine.

Fit and finish just isn't as nice. Do you have a crap airplane that needs a cheap engine? Get the ASP.

BTW, I have heard it said that A-S-P stands for "ALMOST SPINS a PROP"