I have a .5. After saddle hunting the last two years I don't mind the small platform space. It's definitely a minimalist stand though, so it's not built for comfort, but hard to beat that weight..
Unless you're very tall (like 6"4+) I wouldn't get the tall seat post (22"), the standard height, (18") is fine. As for the seat I got the medium size and it reminds me of the same size as my old alpha seat. I'd avoid the mesh seat as it is a welded part, which has been a problem area for some guys. I can't speak for the .75, but I'd say if you're an occasional hang and hunter then that might be the better option. If you hang and hunt exclusively like me, then I prefer the ease of carry and setup over the larger platform area of the .75.
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