I've seen some pressings of records I want to own that are "half speed masters", and I wondered if anyone here has already listened to some records using this mastering technique? Is there a noticeable (and better) difference in audio quality? I'm very much looking for opinions here, I know a bit about how the process works but haven't had the opportunity to do any side-by-side comparisons.

My turntable and speaker setup isn't high-end, so if the quality improvement is only really apparent on very sensitive equipment then I'll stick with the regular masters.