The Trangia is my preferred stove when used with the Clikstand base/windscreen. I don't know all the whys and wherefores, but that base helps the stove perform better than the base that comes with the Trangia Mini or Westwind.
I've only tried the simmer ring once or twice (my suppers are almost always add-boiling-water-and-wait.) But, you know how it is, it's a toy and you have to play with it. It works, but you can't make a fine adjustment to it. In fact, my limited experience has been that, once you put it on the flame, it's difficult going on impossible to reach in, get it out, and adjust the simmer - unless you enjoy the smell of scorched hand-hair. I mostly use the simmer ring to extinguish the stove, but someone recently suggested that a piece of aluminum foil might also work. I'll probably give that a try soon.
The best part of the stove is being able to fill it, use it, extinguish it, and not drain the fuel to prevent spills. Eliminating the "I'm boiling 3 cups so I need 1.2 ounces of alcohol" drill simplifies my life, and is worth the weight to me. I won't try to downplay the weight of the Trangia, or of the Clikstand. The combination weighs 5 or 6 ounces. I've contacted the maker, encouraging him to try a titanium version, and he said he was considering it, if he can work out some technical details. (He has one pre-order for it, naturally.)
However, keep the extra three ounces in perspective. You get remarkable performance. I've not done any tests, but my gut feeling is that the Clikstand/Trangia combination would save enough fuel on a trip of, say, a week or 10 days to cover the extra weight of the stove. There may be some data in some BPL reviews you can use to tell me how wrong I am; however, when you do, consider that those were controlled tests. I've tried the pepsi-can stoves (I'm currently playing with the MoGo Gear Go Torch), and found that in real-life camping I tend to add a little more than I need to boil the amount of water, under the "one to grow on" theory. Then, I end up letting it burn off. If this wastage, amounts to quarter to half ounce a day, that's a couple of ounces a week. The Trangia avoids this waste; if it also uses fuel more efficiently like it seems to, that could amount to another couple of ounces a week. The combination of efficiency and no waste is how I justify the stove's heavier weight. (Ain't rationalization a grand human ability - right up there with opposable thumbs!)