Well I flashed it the other day. I flashed back to stock, but i prefer the WPS/12 sec method over 30/30/30, quicker and easier. Then Flashed tomato, WPS/12sec method, and configure.
For what it is worth, here are my thoughts.
GUI - In general I much preferred the DD-WRT GUI. It looked much more professional. Tomato looks like some one took a very very basic premade web template and coded the menu over top of it.
Menu Order - I really feel the menu order is quite flawed. The first thing on the list should be set up Basic->Network.
AJAX - This is great when doing port forwarding, QoS,etc. However I am a bit surprised it is not further implemented so eliminating redirect screen completely.
Terms - Now I dont know if some of the other firmwares out there use other terminology, but it would be nice if the terms were standardized across the firmwares. For example, my set up was called a Client Bridge in DD-WRT but is called a Wireless Ethernet Bridge in Tomato. Also instead of a Default Gateway,as it is refered to in Windows and DD-WRT(and linux in general if memory serves me right), it is labeled WINS. Not that it was overly hard to figure out which one I needed to use, but consistency is always nice.
Now I realize most of my feedback was negative, so I do want to balance it out and provide some positive criticism as well.
AJAX- As I mentioned above, where it is implemented, it is great to have. Adding ports to the port forward list, or changing things related to QoS is so much more efficient.
Throughput on Wireless Ethernet Bridge - I more in the 5.XX MB range then the 6 MB range. Now I average a bit higher in the 6.XX range. Even my max seems to be a bit on the higher side.
QoS - I havent actually adjusted this yet, but just by looking at it, it looks much more advanced then the QoS of DD-WRT. Despite that, it looks as though it should be quite user friendly in the end.
Stability - Seems more stable over all. 2 Computers on the network are able to torrent at the same time, while still handling live streaming feed on one, and normal browsing on the other, with out dropping the connections. This was despite following all the connection tips on the DD-WRT wiki including under clocking,depending on how you look at it, the CPU.
So in the end, my negative comments are actually quite superficial if you look at it compared to the cons.