Thanks mate, so it would seem that they are inferior to Maxtrax on that testimony and doesn't sound like they abused them (initially) but as above I know of Maxtrax failues as well.
Personally I think the environment these things are to be used in is always going to make it tough.
Lucky I have big Jules Mallee tracks, they come with a 10year , money back grantee with an instant recovery call out should they fail