Wireless bike computers

Hi all,

my computer has died and I was considering getting a wireless
computer. I don't want to spend too much and I was thinking about the
Echowell Echo W2. It has all the functions I want and isn't too
expensive.

So how much of a problem is interference and drop-out with the
wireless models? Riding is usually a sole effort for me, so no need to
worry about "cross-talk." Pros, cons, all comments gratefully
received.

Thanks,

Peter