I started using HE tunnelbroker.net today (Zurich tunnel) and I have to say it is awesome! Most IPv6 destinations are within 1-2 ms RTT difference compared to IPv4 at the same destinations.
There's a slight catch in the tunnelbroker.net interface, though. The IPv4 exhaustion counter is rapidly depleting my laptop battery, and it would be a really nice feature if I could disable it (or simply not load it in the first place). I understand that the counter is a good motivator for people to start using IPv6, but if someone is logged in, there is a good chance he/she knows about IPv4 depletion, is actively using IPv6, and the counter won't have any benefits for him/her. To summarize, having the option of turning off/removing the IPv4 exhaustion counter for logged in users would help probably quite a few laptop users.
Please consider this as a humble feature request. Thanks!