As they say, "location, location, location"! My HomePod mini seems to sound best when placed on a hard flat surface like a desk or table. I've read quite a few reviews that state various stands sold for it by 3rd party vendors actually hamper the sound, and I can see why. The HomePod mini was designed to sit by itself without nearby obstructions that deflect and reflect sound. Covering parts of it up with a stand is going to change the sound. I do wish Apple would have given it a non-skid neoprene bottom plate though to keep it from sliding about so easily, and a longer cord too as 6 feet is barely enough for my living room.
I'm blown away by the quality of sound from such a tiny speaker, but it is best with the volume not set too high and when listening to jazz, classical, and less noisy music genres. Hard rock is a bit too much for it, especially if you turn the volume way up. It won't compete with stereo setups by any means, but it is better than any Amazon Echo model except for the Studio, which is in a different class of speakers altogether. It is definitely better than my Echo Plus 2 though.My biggest complaint is not the sound or speaker itself, it is Apple's absurd lack of features within the Home app as well as the sparse number of available HomeKit accessories that actually work with HomeKit.