I am no sound engineer nor musician. I am just bit enthusiastic and also quite picky. Picked up the Alto mixer as it had enough features to cover my needs and I already had Alto speakers. Bluetooth was also a big bonus.
The mixer works good. I have no complaints over the functionality or the quality of sound. Only negatives I have is the crappy power supply/cable. Wish it used something nicer. Another nit-picky thing is that some of the knobs/potentiometers are not very smooth. Don't get me wrong - they are not sloppy or poor quality, just they don't turn as smooth as others.
I also wish Alto provided better documentation on set up, specially with their own speakers. I had some trouble figuring out how to set the mixer up with their subwoofer. Tops worked fine the traditional way, but subwoofer was more trial and error.
If you need a small mixer, I recommend. When you have PA tops but no mixer, I recommend getting one. Improves sound a lot.