Pink Floyd's "Echoes"

It's a strange release this one in terms of the track listing,covering all 3 phase's of Floyd from Barrett to post-Waters,since I'm not much of a fan past '81 I was going to give it a miss however the remastering(yet again!) angle will probably drive me to buy it now.
The very idea of a best of Floyd seems odd and another blatant record company/band ploy to milk the cash cow that is Floyd.
Does it work as a record in it's own right or does it just sound like a lot of disjointed snapshots ?

I think this compilation works far better than you'd expect considering the track sequence throws very different era's of Floyd together rather than the safe method of earliest recordings first .
It sounds great too(probably the best versions yet) and sequencened and edited very well.
Quite cleary finishing on a Barrett song is to take the journey full circle,a very Floydian approach.
It's a very good reflection of their total output although if you wanted to be a purist you could say the edits on Echoes and especially the joined but edited Shine On You Crazy Diamond don't work as well as the originals.
For me too it reflects quite clearly where it went wrong on the lesser quality Waters meglomania tracks and the Gilmour "decent forgery" attempts when Roger Waters left.
Worth getting even if like me you had most of it anyway.
Does beg the question when will the back catalogue be remastered to this standard?