MFSL worth it?

MFSL are just like any other pressing. Some were better, some were not.

Sometimes the masters were shot, played out.

Sometimes the match between the original recorder and the playback deck was poor. Even though the tones aligned, the music didn't.

Sometimes EQ copies were used as the master had been damaged.

Sometimes combination of tape, eq, lathe, computer and laquers detracted.

If you can get more than you paid, sell it!

If you're an AB fan, open it up and enjoy. MFSL vinyl consistently has sounded fabulous in my experience. The Rolling Stones Sticky Fingers pressing that they did had so much detail and resolution, it blew away the original. I can't speak as what they've been up to recently, but in the 80's, MFSL was the place to go for the best sounding source material.

I hear the difference MFSL LP's that I own from the late 70's and 80's. For me they are the very best recorded Lp's ever made. If your lucky enough to have a collection of them, by all means do your self a favor and record them on a 1/2 tape recorder, and try not to over play them .  Keep them all and enjoy them ,they will never make those MFSL like JVC did made  in Japan. After saying all that tune up your system sit back and crack that system up and enjoy life is too short.......

In my collection of LPs, from the 80s, I have a dozen or so MFSL LPs, everything from orchestral classics to Neil Diamond's "Hot August Night" to Pink Floyd's "Dark Side of the Moon". Since I bought them for their good sound and not for their future collector's value, I played them a great deal over the years and still do and they still sound very good.
 
I'd say, unless you're in a pinch for money, keep the sealed album sealed and hold on to it for a while, buy the unsealed album, take good care of it, but play it and enjoy the great sound...JMO.....Jim

My experience with MFSL goes back to the late 70's and thru the early 90's with their vinyl pressings including the original UHQR stuff.
I enjoyed the quiet surfaces and flat discs compared to commercial pressings but sometimes their EQ differed from the original...sometimes too bright sometimes just right. 
When they started producing CD's, I stopped buying them except for a few examples because they didn't sound "right".  They tweak the EQ to make the sound "better" with increased detail but most of the time I don't like the sound as good as the original pressing on vinyl.  Also, a lot of their choices in the Rock department are good Artists with lousy recordings in the first place so the MFSL treatment just makes the warts more apparent.

I'll buy their recordings if I know they sound better than a original or a remastering of an original which never seems to sound better IMHO.