Reviewers largely see SimpMusic as a polished, ad-free Android music app with a clean, Spotify-like interface, strong customization, background play, downloads, lyrics, and easy syncing of YouTube and Spotify playlists. Several say it feels close to a premium music service without the interruptions. The main complaints are reliability and playback issues: buffering, slow loading on weaker connections, occasional crashes or cache errors, and some trouble with offline downloads. Users also want better library sorting, playlist ordering, synced lyrics, search, recommendations, widgets, and easier sign-in.