I've had mine for about 18 months or so.
The main console has a few problems (failure of the touch screen mainly) but the data keeps coming through to the PC fine.
Still going on original batteries too. Oh yeah... I've had a few problems with spiders setting up camp in the rain gauge. The buggers tie up the tippler... it must keep them awake on rainy nights!
I've only been running Cumulus since December. Its the go though!
Al.