I use a Sigma 1606L (wired) on my Univega and a Sigma 1606L (wireless) on my Orbea. No real problems to report with either computer. The wireless does loose contact from time to time but seems to reconnect without loss of data. No problems whatsoever with the wired Sigma. When I've had to replace parts LBS has been able to get the replacements ASAP. Again, I've been very happy with both computers.