first sorry for my poor english
The umi3 is really good. I have 2 units since the first launch of the product years ago and never got an issue with it. I'm using it a lot on stage , it's build like a tank, no plastic . I really think it was build by musician for musician and not for marketing. I'm Changing my midi controllers according to my use for each project, but this one is always in my setup.
The unit is more than 3 switch as you have too an expression pedal input ( or any pedal like sustain but in this case it will work like a button). The expression pedal is really useful with magic for dry/wet setting for mixer input or fx as you can send continuous controller.
The editing software is really intuitive and stable. You can use switch with release or not, for exemple send a 0 value (note, CC or anything) when you release the switch, so it can work as a keyboard touch. You can too make sequence, for exemple each pressure on the same switch send a new note, according to your choosen sequence so it can be use as a "more than 3 switch" controller
This product is expensive if you compare it with others cheap products in the market , but in my opinion if you want no issue on stage and durability, that's really the best choice.
here is the direct link from logidy , with the software and manual
http://logidy.com/?pid=5