I guess there’s no perfect solution when it comes to rain covers. I’ve had this rain cover for a while now. It’s the best solution that I’ve found in terms of size, manufacturing quality and portability. It comes with its own storage pouch with a loop and I’ve attached a carabiner so that it can hang from a d-ring on my camera bag if required. When the cover is wet it is nice to have a self-contained pouch to stuff it back in to and keep it separate from other gear.
Fitting is pretty straightforward, slip the camera in and attach to the camera’s hot shoe and then tighten the cinch strap around the lens hood. Even though I bought their small sized rain cover to suit my micro four thirds gear I find that the strap is still a bit big for most lens hoods but it does the job. Fitted here to my Olympus OM-D E-M5 mk2 with Lumix 12-60 mm lens.
There’s good room inside to get both hands in to operate the camera controls/tripod adjustments and the large transparent top/back panel affords a good view of the LCD screen etc.. There’s also a draw cord at the base of the cover.
All-in-all it has proved useful on a number of occasions, it weighs next to nothing and is a worthwhile addition to my camera bag.