It's a good earphone overall. there's little room for improvement.
Fitting is good. being able to change the things that fit into the ear makes it very easy to find a good fitting.
The rubber band connecting them still sticks to the skin and pull them out of the ear a bit, but you can mitigate that with an over-year fitting or just wear them in front of the neck , rather than behind the neck. not aestetically beautiful but solved the issue for me.
Audio quality, not the best, but definetely more than enough for gym sessions, run in the street ...etc...you're not buying a home theater to your living room. it's just a earphone ! ha!
price could be a bit cheaper ! maybe arou 60 pounds would be fair.