The other Mark Todd ones look a bit better really. Though I cant stand travel boots anyway, in my opinion the horse can stand much better in the lorry/box without them!
But if you really want travel boots, i think the other mark todd ones look more substantial!
I'm lucky with my mare that she's a fantastic traveller and doesn't need boots. I used them once but it was more fuss than it was worth and they only rubbed. I try to keep travelling simple rather than complicated so she doesn't stress out. That said, I can totally see the benefit of them for not so good travellers who kick move about etc.