Mine runs great but I've only had it for a few months (4 gallons of Omega 15% nitro).
I thought I saw Bax saying that anything after 1997 didn't have liner peeling problems.
Mine is so reliable that I take it for granted. Starts everytime, no dead sticks.

The low end is at least a 1/4th turn too rich out of the box. Break it it lean and high RPM as soon as you first start it. Run for a minute. Let it cool. Do it again. Keep thermal cycling it like that and it breaks in real nice. DON'T 4-cycle it like the manual says. There's a procedure for breaking it in and Bax has the link. Do a search to find it.

I personally would fly a tad rich for the first 5 tanks. Then lean it out after 10 tanks (but still a hair on the rich side).

Plenty of good engines out there. Take your pick.

Joe