Maaaan. I've tried both the X10's and the X20's, and I really liked that they have soft, flexible ear hooks and physical buttons. Some of the other ones I've tried had stiffer hooks that would hurt my ears after a while, and/or the controls were via touch, not an actual, clickable button.
But both the X10's and the X20's had this weird skipping/stuttering issue whenever I was out and about (walking, running, etc.), but were just fine if I was stationary. I think it must've been some sort of interference issue, but I just don't understand. I have some older bluetooth Soundcore earbuds that don't have that issue, but they're on their last legs, so I've been trying to find a replacement.
Yeah, um, those look pretty beat. I've heard 300-500 miles (~500-800km) for running shoes. I don't own a car, so I walk a lot, and had been replacing my shoes every 3-4 months since I was wearing a single pair for almost everything. I recently decided to buy one pair for walking and just casual use, and a second pair that's just for running.
I have definitely had times in the past where I began to notice some minor aches when running, so I bought a new pair of the same shoes, and the aches disappeared!