I purchased this mixer specifically because of the ability to control it from my tablet or phone. That feature alone makes sound checks a one-person operation when adjusting levels.Before purchasing I carefully read reviews of this and the larger UI16 model and was well aware of potential WiFi problems. This model has some range issues that are easily resolved by connecting an external router or a booster antenna. I tested mine with a Thought it was time to move into the world of digital mixing so I did some research and decided on the Ui12. The name Ui12 is a bit misleading, but almost all mixers these days count every input in their channel count. This unit has 8 channels with 4 having combo jacks for xlr and 1/4" input. there are 2 rca jacks that act as a stereo pair (channels 9 and 10) and a usb jack for plugging in a flash drive for break music or backing tracks (channels 11 and 12). unit has 2 aux outs for monitors, 4 if you assign the 2 headphone jacks as aux outs (cool feature). Channels 1-8 all have gain control, 4 band eq, dynamics including compressor, de-ess , and an rta! Effects include several reverbs, delays, and choruses.All very usable. Also has built in feedback suppression which I have not used yet but nice to know it is there if you need it. Channels 1 and 2 have digitech guitar modelling built in so you can gig without an amp if you choose, super nice feature!!!Can be used wirelessly with just about any device that has a web browser and can read htlm5. I have used this with a windows laptop, android tablet, Ipad, and my Samsung smartphone and all worked flawlessly. Some have had problems with connectivity,but I replaced the tiny antenna that came with unit with an 8 db aftermarket antenna I bought here on amazon and get great signal out past 50 feet from the mixer. Far enough for any gig I use this mixer for. I use this mixer mainly for acoustic groups I play with, duos and trios mainly, so I have no problems with lack of channels. If you have a full band I might step up to the Ui16 which has 4 more inputs and recording capabilities. I run this mixer into a LD systems maui 28 and the sound we get is outstanding! Clear and articulate with little or no background artifacts, as long as you have clear idea of how to properly set gain structure. Overall I am more than pleased with my purchase, Soundcraft has stuffed a whole bunch of cool and useful items into this mixer for about the same scratch as a decent 12 channel analog board, but the Ui12 will do things an analog board can only dream of. If you are looking to step into the world of digital mixing and don't have a few grand lying around to throw down on a mackie, qsc, or yamaha, then you should have a look at the Soundcraft Ui series. These mixers are awesome!For inexplicable reasons, known only to the design staff at SoundCraft (and SM Pro Audio, the original designers of these mixers) the little 8 channel version is not intended, (apparently) to rack mount. This is of course insane. Many, if not most times, I would want to rack mount this little buddy. If you drill through the rubber boot on the end, you will find that the actual holes are already through the metal, you just need to drill through the rubber.• Just like the Ui16 12 channel, and the Ui24 20 channel, the mixer functionality is nearly flawless, my biggest complaint is the MIX/GAIN pages use the same button, which is confusing for some users. The internal MP3 player is terrific, and the EQ and limiting on each channel, each subgroup, and each output are indispensable !• The biggest shortcoming is the limited range on the internal hotspot, but this is easily fixed with an external wireless router.It’s a really good mixer once you know it all. Great sound and fidelity. For better fidelity signal and connection use an external router with 5G. Everything else works perfectly.So let’s start off by saying I hope my issues are resolved. I used the internal Wifi at a gig, and lost the signal( no ability to control the mix) after some reading, seems this is a known issue, but can be fixed via a external router. So now I’m working with a new set up( external router, iPad and different browser( google was possibly part of the problem). Not everyone will experience the same issues, but you need to play with your connection settings to get them to function properly. As far as the mixer itself, and all the add ons... I would give it 5 stars if I didn’t have drop out issues.Use these on Bar/ restaurant establishments that provide live and recorded music.Best Digital Mixer in this range.I am writing this review after using this it.I have interconnected this mixer with another mixer and I am using it as a brain while controlling all outputs together.Built in presets for dyanamics and FX are awesome, saves our time while setting it up.AFS is really helpful in live concerts , avoids unwanted feedback frequencies.Lexicon FX for vocals sounds premium. Recording are also best on class but doesn't allows us to control every channel after recording. This nixer is value for money for small functions and events.