In reply to restless native:
I have a pair - bought cheap as I love their running shoes. They are great for trekking, especially on hot, dry surfaces. I can imagine they'd be great on the TMB. However the the thick sole and soft ankle makes them rubbish for any scrambling or rocky surfaces (I'd imagine they'd be less good on the GR20, for example, which is more ankle-turning). They also don't have the deepest tred.
The sizing on mine was massive, and I needed to add insoles. So 'really good' but only on some surfaces.