I think so! Been using one since March '08 and I love it.
The base map doesn't have routing information, so if you want to auto-route you'll need to add City Navigator or NT maps.
Get a good set of rechargeable batteries and upgrade to the latest firmware to gain the latest fixes/features.
Happy Caching!
Thanks Fegan. Yeah I don't care if the maps are high quality, just good enough to go caching.