GCarbon -bad service

Installed the optimiser Nov. 2014. One unit burnt out Jan 15, 2015. 8 Mont's battle to get it fixed without success. No reply on my e-mails,and no performance from their side. Now took legal action to get my money back,and all of a sudden they now wants to fix the problem but says there is no way they will refund me.<br> Beware of them.