Quieter, smoother and should hopefully last much longer.
Bought this to use with my Whyte Wessex road bike on an Elite Rampa indoor smart trainer. I'd recently switched the road tyres that I normally use (Schwalbe G-One Speed) to a gravel tyre (Schwalbe G-One All Round) but they were just too noisy and were wearing out pretty quickly on the trainer. The Schwalbe Insider tyre is simply much quieter and rolls smoother... and should hopefully last much longer.
Downsides? You'll need a lot of levers and tough thumbs because this tyre was really quite challenging to get on the rim compared to Schwalbe's TLE tyres. It also shredded excess blue rubber all over the floor with the first couple of uses which was a bit worrying... but that seems to have settled down now.
Other than that, I'm impressed so far.