After analyzing the user reviews on the Apple App Store, I've extracted three cons and pros for you: **Cons:** 1. Some users reported issues with laggy performance, causing delay and affecting live performances. ("Laggy and slow, couldn't use in live performance") 2. A few reviewers experienced connectivity problems with MIDI devices, citing inconsistent behavior. ("Couldn't connect to my keyboard, very frustrating") 3. Some users felt that the app's interface is cluttered and overwhelming, making it hard to navigate. ("Too many options, confusing layout") **Pros:** 1. Most users praised the app's reliability and accuracy in monitoring MIDI signals, calling it a "rock-solid" performer. ("Really reliable, works like clockwork") 2. Many reviewers appreciated the app's simplicity and ease of use, saying it's perfect for beginners. ("Easy to use, great for newbies") 3. Some users liked the app's ability to display MIDI data in real-time, finding it visually appealing and useful for analysis. ("Great visuals, very helpful for tracking my MIDI signals") Please note that the reviews are a snapshot in time and may change over time.