I had an i7 until it died, and now an i10, of which I have had one that died.
The user interfaces are ok, battery life is great, and sound quality is very good.
There are loads of eq options but I only use the mp3 enhance option, which seems to work well, I think you only need the eq if your headphones are a bit suspect.
I use them mostly as they can play mp2 recordings, which is what dab uses, as I record some radio shows on a pure bug.
Although the recordings are mp2, which is less efficient than mp3, I find the sound pretty good through shure se535 iem phones with the mp3 enhance on.
I think the only problem with the sansa clips is if you use much eq, they don’t seem to have the grunt to power it. My wife has one. As long as you use decent phones you should be ok with one.