SOS vs MUSTANG
I have two different models of the SOSpenders Auto-inflate w/harnes, both sold by West Marine. The 1st one is marine blue, with the air bladder incorperated into the cover. This model opens from the inside. It''s a little lighter, but I found that the inside seam chaffed my neck a little. My wife wears this one. The 2nd one I bought is the off-shore model and is heavier. It''s navy blue, and the bladder is independent of the cover, which opens from the outside, so you have a seamless yoke around your neck. As for SOSpenders, after the problem they had with the auto-inflate bobin vender last year, they gave me a full refund for the earlier model I had, plus an additional $20 gift cirtificate to West Marine.
Mustang Vs SOS: buy the one you''re willing to wear full time, all the time. Either one will save your life.