OHL is a much better league to be in U20 if your hope is to play in the NHL. Mesar was playing professionally in Slovakia with former OHL standouts Jamie Arniel & James Livingston (both now age 33), a handful of somewhat once-notable CHL alums and mostly career Slovakian players. Average age is probably mid 30s making it hard to compare with even minor pro like ECHL here making it somewhat more like our 'past prime' Allan Cup league (?). It's good hockey IMO and pays enough to cover the bills in Europe at least during the season but well South of AHL, SHL or Finnish Liiga $. Either way it's certainly not the mainstream development league for young NHL prospects that the OHL is.
If/when he's drafted (& signed) by a NHL team, the money levels and odds that he reports here become more favourable.