The Trangia "Mini" has been my main stove for 25 years, although in certain circumstances I use other stoves. Obviously I'm completely in love with it. Congratulations to any new Trangia users!!!
Only really practical for shorter, solo trips though, because of relatively high fuel consumption and of course, the very small pot size for the Mini (not the 27). I've used it with satisfaction on trips of up to four nights. With another person, sometimes, I rely on a fire to cook potless dinners (meat & potatoes) and the stove for morning coffee.
Down sides: you can't use it inside a tent and it's nearly useless for melting snow because of low temperature and high fuel consumption. I remain suspicious of performance in low temps, although I've used it down to about 20F without problem.
Also, in any kind of wind, fuel consumption appears to increase markedly and stove efficiency declines.
I've only occasionally brought myself to rely on the rubber gasket for storing fuel inside stove. I think it could leak. Mostly, I just burn out any unused fuel before packing. Usually this amounts to very little and on very short trips it doesn't matter.
It's amazing that such an old and simple technology outperforms, in certain respects, the latest and the greatest stoves on the market.