It does the job; more comfort to the palm and inadvertently, the wrist, and let's my hand glide more easily.
Large technically fits, when using the regular Delta Hub 2, but due to the strap actually causing a limit to the width, I now wish there was an extra large - I forgot and should have realised when you rest your palm on it, it would overflow out a little.
So large is a little too small for me.
Also, video guide instructs to loop inward and cut to length - I think that's a bad design, so I just looped outward and no longer need to cut to length.