I originally bought these earbuds about 5 years ago when they were branded as UE Fits. It seems like Logitech (which owns Ulitmate Ears) has since rebranded them to now be the Logitech G FITS. Thankfully, the physical product is nearly identical to the original, so I was able to take my original molded tips and swap them onto the new pair. I purchased a new pair because my old pair started having battery issues; this could either be because of age or because I might have messed up the batteries in my previous pair by using a fast USB-C charger. If you get these, make sure to use the included cable to charge them!
Regarding the user experience, there are no other headphones out there like these for me. Airpods won't stay in my ears, nor will many other earbuds simply because of how my ears are shaped. Even the headphones with a hook that goes over your ear to keep them on had issues with becoming dislodged from my ear canal during workouts (even though they stayed on my ear) and would hurt after some time. These earbuds mold perfectly to your ear within just a couple of minutes; as I said earlier, I'm still using my original tips from 5 years ago. Though they don't have ANC (active noise cancellation), they do a good job at blocking out noise because they're a perfect fit to your ear. I've never had any issues with them falling out during workouts, even while sweaty. The silicone tips warm up to your body temperature and given that they're so lightweight, you can almost forget that they're in sometimes. Finally, the battery life is great now; I'll wear them for a few hours at a time with no issues. I just hope I don't have the same battery issues I had with my last pair due to aging. My biggest criticism would be that the "touch" controls leave a little bit to be desired. Once you figure out the "special" way to make the earbuds recognize your touch inputs, it recognizes what you're doing about 9 times out of 10.
These headphones used to be $250, often on sale for $150, under the UE FITS brand, so to get these for $100 here was a no-brainer for me.