MFSL cd's vs. Redbook cd's


I am still fairly new to this hobby. Prior to a couple of months ago, I had never heard of Mobile Fidelity cd's. How much better sounding are these disc compared to standard redbook cd's of the same title? Do the high prices on eBay and other sites equate to a higher quality listening experience? Thanks in advance for your feedback.
houstonjazzfan
I guess it all depends on how good your hearing is Houstonjazzfan. I believe they are very worth the extra especially on 180g vinyl. Does that keep me from sying a great big breath of relief everytime I put on Yes "fragile" gold disk? Not at all my friend! Do yourself a favor if you've invested in a good system.
Thanks everyone for your responses so far. I purchased a Modern Jazz Quartet MFSL cd off of Ebay at a fairly decent price. Hopefully, my ears are good enough to notice a difference once I have a chance to play it in my system.
I own many MFSL discs and IMHO they don't sound THAT much better than the original. XRCDs are much better!