The "beta" in this case is not cearly as accurate than in a classical project. In fact the two projects are in perpetual developpement, so they prefer using the beta term to rember you that they cannot be reponsible for dommages ...

They are stable, I use Tomato (Toastman or not) for a while and have no stability problem. Only sometimes bugs if you want to install the latest latest version... but generally they are rapidly corrected.

Download speed from WAN is not a problem, the only real problem if speed is through wifi perhaps compared with Netgear original firmware (both Tomato and DD-WRT).

For QoS, latests Toastman Tomato builds are very intersting, with introduction of a new MAC/IP bandwidth limitation that will replace the 'ancient system'.
(see here : http://www.4shared.com/dir/v1BuINP3/Toastman_Builds.html the Readme file for details, and the correct builds are in the RT-N16 section. IPv6 GUI and 6to4 tunneling is implemented, experimental and in testing).

You can easily switch between Tomato and DD-WRT Kong mod, and reverting from Tomato to Original firmware seems easily possible, even if some havev reported problems.

WNR3500L running Toastman's Tomato.

I use Tomato since last summer... So many restarts lol... After each firmware flash, after some settings changes that need reboot.. No problem.

I mean I restart the router if I need to... No bug making it rebooting alone.

Why do youi need to reset the router once a week?

WNR3500L running Toastman's Tomato.

I don't know as it can depends on many factors, but I have sometimes 4 machines connected to the net and my router is OK.

WNR3500L running Toastman's Tomato.