I'm gonna go ahead and skip to the negatives straight away because there are only a few. The rest are positive and in general, I totally recommend this product.
1) Some glitches here and there that are always getting fixed by the kemper team with software version updates. This makes the profiler a bit unreliable in live situations but the longer this product is being released the fewer glitches will exist. Onward and upward.
2) The handling of the Rig Manager is weird. While the profiler is very easy to use and change things on the fly, its software is one of the worst. Many times I am saving rigs at the wrong place and losing rigs by mistake or thinking that I saved some rigs and it ends up I didn't. This did not happen once or twice. It is the way the rig manager works. This makes me want to use the actual stage profiler instead of the software because it is more user-friendly than the actual software. I am patiently waiting the kemper team for fixings on the software keeping in mind the ease of use.
Other than that the stage profiler is perfect. User-friendly with big enough HUD to be able to navigate through different screens, sturdy built and great sound quality, and I love its looks as well.
As I said before this is the only downsides to this magnificent product. I recommend it to every guitarist and maybe even bass players, but I haven't checked the bass sounds so I don't really know