*watch the video review for a quick run down*I want to preface this review by saying nobody influenced me to write this. I am writing this out of my own compulsion to do so, because that’s how stoked I am on this product. All the frustration my band has gone through with other IEM systems we have owned (live performance drop outs, battery doors busting, belt clips flying off, horrible sound quality and volume levels, etc) I had to write this. Read on..I have nothing but great things to say about this Phenyx Pro IEM system for the price point. Every other sub $500 IEM system my band has used has failed in one way or another, primarily with signal drop outs during live performances which is VERY FRUSTRATING.PROS:-Sound quality is much better than any other budget IEM system you will find. Is it Sennheiser G4 quality? No. But there’s zero latency, and the minimal static noise you might hear is to the point where you’re not gonna dwell on it.-This packs in 4 channels for 4 individual mixes in 1u rack space. WHAT?! It saves a ton of space.-No need to label body packs. Each pack simply pairs to the channel of choice through infrared sensors. Select channel, hold pack to sensor. Done. You can easily switch between IEM mixes or rapidly share mixes with this feature.-Includes rack mounts, antenna cables and holes to mount antennas in front of case. WIN! Having direct line of sight at shows is great, and the antennas fit with the front lid of the case without having to take them off.- VOLUME. These things are easily 5x louder than our previous packs. No need for headphone amplifiers at all.-Input peaking? Input volume control knobs for each channel on front of display.-Easily change frequencies for each channel. Group button and RF channel button for each of the 4 packs.-Quality. Heavier duty plastics and metal. You won’t have battery doors flying off with these. The belt clips are sturdy as well.-Dual inputs to insert a second line for click, another instrument etc.-Loop ou.