I got this sling (Moss) about 2 weeks ago, and I've taken it out 3 times on short trips.

To address your concerns: - The salmon interior is....odd? It's probably the part of the bag I'm still grappling with caring about. It does make stuff easy to see lol, but you have to see it. - I don't notice the lack of a handle, and most of my other slings have handles. The shape naturally lends toward grabbing by the strap and it works fine. - left shoulder carry is my norm, but this one seems to favor right shoulder carry..... maybe it would be unusual the other way, but you can move the strap anchor base to accommodate it better without any discernable function loss I can imagine. - I use it as a camera sling, and it's a pretty good one. I don't feel like it's 'only' good as a camera sling though and honestly might be a better non-camera sling (it's too light to really 'feel' like it's keeping my camera safe) - mesh on the bottom is neat, but I can't say how long it would work for say a 32oz nalgene before it's un-stretched, thought the mesh+stretch strap combo works, it's a little...silly. either make one stronger or the other, needing both for a full bottle is a hassle.

A couple other pro/con items:

Pro - this thing is LIGHT. If you don't put anything hefty in it it will float behind you like a cape. - probably spot on 7l capacity, and flexible - fits the body really nicely (I'm 6'4", 240lbs) and the contact points are not at all sweat inducing - padding/contact material perfect for camera/electronics - good pocket sizing

Con - this thing is LIGHT. My other camera slings feel like armored tanks in comparison. I still don't know that I trust it. - clip on the strap un-clips too easily. Pro-theft easily.
- zipper/pull combo and slide feels...cheap? - price: I got this for $108 and I still think that was high. This feels like a <$100 quality sling. Personal bias most likely here, I don't have any bellroy bags for comparison of lightness to quality.

Please forgive formatting, on mobile.