Yes, though I'm at best a casual fan. I came into them through their inclusion on a space rock boxed set from Cleopatra records (featuring an older, more "space rock" long guitar/synth jam track from maybe '96 or so) - I find them like a modern Floyd, though I never did identify with Floyd.
I just purchased "In Absentia" and my wife and I listened to it once when not paying much attention to it... a few weeks later, we listened again and wondered what the heck we were listening to, since all the songs sounded like we've known them for years, and we then realized it was only our second time through the disc. A really amazing outfit - I wonder if they'll eventually be given the credit Radiohead has gotten, as they seem to fit that niche between pop and space, and maintain an edge, and their material is of truly great quality.
My exposure is: In Absentia, Up the Downstair, Stupid Dream
And, yes - "Stupid Dream"... what a song!
ps - I own two alephs ; )
pps - my initial interest came via the Ozric Tentacles/Hawkwind sort of angle of their earlier material. Their newer material is not of that sort, and my horizons have expanded with them and I continue to enjoy their new work. Again, top quality outfit.