Jazz Heritage Society - How do they sound?

Guys, someone recommended the Jazz Heritage Society and I saw some CD's I wouldn't mind having, but I am concerned on the sound quality. Does anyone have any experience with them? I have purchased too many poorly recorded/poor sound quality CD's from the local stores and now either buy Vinyl or CD's (or SACD's) that have been recommended by fellow audiophiles, audio magazine reviews (quality wise, not contents wise), etc.

I'd appreciate any input.

Thanks,