Many on here have used Exactfit belts successfully for a number of years and I've never heard of any failures.
http://www.ukmonster.co.uk/monster/s...ad.php?t=56571
I've bought a pair myself but haven't fitted them yet. The look and feel of them certainly seems to be on a par with OE belts, if not better. If you do buy Exactfit belts, be aware that the recommended tension is lower than the OE versions, so be careful not to overtighten them.
http://www.ukmonster.co.uk/monster/showthread.php