I've had the tripmate nano for quite a while, and with openwrt it is good for two things:
1) as a very slow hardware VPN client, so I don't have to keep authenticating and can secure access from alternate devices like my phone
2) for a couple of hotels I've stayed at where the Wifi signal was very weak, but they had a relatively good ethernet connection.

It and the original elite both support OpenWRT -- something like that is a prerequisite for using it as the VPN bridge.

I've been very pleased with the nano. Sadly, the Titan (and the new Elite U which I just noticed) do not seem to support OpenWRT (at least yet.)