personally im not a fan of r mechs, i dont know why i just dont like them.
ive been using the tension seeker for a while now and i do like it fair enough it probly did mess me about more than a mech but ive allways been able to get better tension from my tension seeker than i have my mechs.
now its coming to the end of its life im gonna need a new one soon and to me the problems the first one had have been sorted out with the new one apart from the spring witch does last me quite a while, and if it does brake or anything send the spring back to dmr and they wil replace it.
wouldnt mind trying the rohloff though.