Great sound quality, definitely better than Suno 5 and 6. It let me download a WAV file which goes unfiltered up to 20kHz (Suno goes to ~15kHz and has more artefacts).

Here is my first attempt: http://rochus-keller.ch/Diverses/Polyphonic_Threshold_1.mp3

And here are some Suno v5 tracks with the same prompt for comparison: https://rochus-keller.ch/?p=1428

All in all, Suno still has much better musicality (or at least had in version 5), but the sound quality of elevenmusic is clearly better.