I picked up the black stealth 30L last week. Great piece of kit, and a slightly different material [taslan] makes it more able to deal with prickly stuff - a barbed wire fence in my case. OK - no window but I did'nt care for that anyway - just one more thing to go wrong. The matte black colour is less obtrusive than some of the more dayglo versions and the billboard effect is nicely muted.
The strap problem appears to be a thing of the past if mine is anything to go by. The webbing feels a little thin, but this is supposed to be lightweight and minimalist. The waist srap is just to stabilise things, not padded in anyway and is a nuisance if you are'nt using it, it's tempting to add a padded belt, if I can find someone who makes such a thing.
Overall for 22 squid it's a steal, and will probably live in my canoe for the foreseable future.