Better than BA Club World or SK C
I think the "new" seats are the same as OS have.
I'd say it's a solid product, but nothing fancy. I do fly them frequently to Asia and even the "dreaded" old-C on the A340 is quite OK for day flights.
AY robs you blind if your origin is in Finland but gives extremely good value for ex-EU (and especially E-Eur EU) origins.
Try to price out
WAW-HEL...your destination...-HEL-LHR if you don't want to go back via WAW.