The ability to hold a shot of fuel is a definite plus of the trangia stove. While it is more heavier than pop-can ones, its also a heck of a lot more robust. I can stand on mine without effect and I've accidentally crushed more than a few super-cat stoves just by virtue of it being in my pack. There is also a big difference in weight between the miltary burner and the commercial one, with the commercial one being quite a bit lighter. I like the commercial one because its lightness makes it prime faster.
I do have to say though that I like and appreciate the trangia cooking system (commercial one - 27-series) as much, if not more, than just the burner. As I recall, my kit cost $64 and included a very substantive burner holder and wind guard that really makes this stove work in a variety of conditions. The burner holder keeps the burner off the ground which is important in winter. All you have to do is keep the burner in your pocket and it will light readily in the burner holder and self warm/prime itself down to below freezing temperatures (I've only used it to -7oC). It also includes two pots, fry pan and a kettle that all nest into a nice little kit. The kit is great for two people but a bit excessive for solo. The pots and pan can just as easily be used with a fire. I find I tend to leave the kettle behind more often because it doesn't hold as much water as the pot and I usually want to boil more than 1 3/4 cups at a time and it just contributes to weight (but no bulk as it all nests together). Finally, the simmer control top works great. I have as good of control of heat output as I do with most valve-based fuel stoves except perhaps some exceptional ones like the MSR dragonfly.
I have yet to use my whisperlight stove since buying the trangia one, I like it that much. The only reason I keep the whisperlite is for when I will do winter camping under very cold conditions.