Reviewers largely see SimpMusic as a polished, ad-free music app with a clean, Spotify-like interface, strong customization, background play, downloads, offline use, and handy YouTube and Spotify syncing. Many call it their main listening app and praise audio quality and ease of use. The main complaints are reliability and speed: songs can take too long to start, buffer, pause, or stop unexpectedly, and some users report crashes, lag, failed downloads, broken widgets, and playlist issues. Lyrics sync is another frequent weak spot.