Yeah I did look at other ones Chris but I found a cheap powerbreathe on eBay.

I find it is actually hard work but you have to use it often to see results so I'd look for a bargain on eBay rather than paying full price if you think it'll take you a while to get into the habit of using it frequently and fitting it into your schedule (like me).

I do think it is worthwhile though so far. I can feel aerobically strong running but still find it is hard work on a lower setting so I doubt I'd 'grow out' of it too quickly!