I have a Kemper "toaster" and I take it out to gigs so this seemed like the obvious choice.
Alright, so it's a little on the pricey side for what it is, but I like the fact that it's got the Kemper logo and it fits!
It's actually roomier than it needs to be. I've heard some people say that they can also fit their Kemper Remote in with the toaster, but I keep my Remote on a floorboard.
Both the bottom and the top panels of the bag have zips, presumably so you can fit the Kemper inside facing upwards and then leave it in there permanently, unzipping the top and bottom panels and folding them out of the way to connect cables at the gig. I tried this for a while and it does work, but it's a tight fit this way and a little awkward to fit the cables, so I've gone back to using the bag just for transporting the Kemper and lifting it out at gigs.
It's fairly robust, with tough nylon zips and decent padding. I have actually dropped it with the Kemper inside once and it did a good job of protecting it. Thank goodness!
Finally, it has three very roomy pockets, for cables, leads, whatever.
I'm glad I bought it and would definitely recommend it.