No experience with an Omega but I've had a AV for three years this month. I've had a lot of trouble with it. It like the YH, Hatsan and probably the Omega are fast to fill an SCBA but if you've spent weeks and dollars with down time that Shoebox would've of filled the bill. I already owned a nice 30gal shop compressor so I purchased a F10 about three weeks ago. I also got my AV up and compressing as well as new but I know there's going to be that next breakdown. Might be on the next fill or 6-12 months from now but it WILL happen. It's sure is nice to know I have the SB ready to go. I haven't had a tank pulled down far enough for a good run on the SB but from what I have seen it seemed pretty fast too me. Faster than what I was expecting. Not a 17-20min top off time but heck, I'm not in that big of hurry. Oh, the 30gal shop compressor hardly ever runs. I'll post more when I get a better run time.
Jking