4:38 p.m. on August 28, 2006 (EDT)
Dave -
At this point in time, Primus, Optimus, and Brunton are not connected with each other. Optimus still owns Svea, but sold Primus to Seviert many years ago (briefly, Primus took over Svea in the 70s; Optimus took over Primus in the 80s, using the Svea name only for the 123 and the Primus name only for compressed gas stoves; Optimus sold Primus to Seviert (a welding products company), and kept the Svea name for the 123; Seviert re-extended the Primus line to include liquid fuel stoves in the 90s; Optimus marketed through Brunton starting about 2000; Brunton started its own line of stoves, with Optimus going its own way this year, the Brunton label stoves to be marketed this fall)
Anyway, I have had good experiences with all my Primus stoves, starting with ones owned by fellow climbers and my first stove purchase of a Primus 71L in about 1960 (the 71L is very similar to the Svea 123). My only failure with the 71L was a failure to pressurize, due to the fuel cap gasket being worn out, and much later, the jet getting worn assymetrically from 35 years using an external cleaning needle. My one failure with a Svea 123 was due to overpressurizing with the auxiliary Optimus pump, resulting in fuel being expelled through the pressure relief valve. I also had the flexible fuel line in my Primus MFS develop a small leak, thanks to over-bending it when stuffing it, no, make that jamming it, into my pack one too many times. Then there was the time I dropped the white fuel pickup line off the pump for the MFS into the snow - it's hard to find a white object in white snow, though I did find it the next day.
Note that in all cases, the failures were due to abuse or carelessness. Except for the one post above, I have heard of no one having a problem with the bayonet hose attachment with a Primus. I have heard of minor problems over the past couple of years with some of the Optimus stoves (remember, Primus and Optimus are independent companies, and are located in different countries). But even these were all "operator error" in nature.
Basically, stoves are pretty simple devices. If you take care of your stove, it will behave properly and serve you well for a long time (45+ years for my Primus 71L, 40 years for Barb's Svea 123, 20+ years for my first XGK, which MSR swapped for an XGKII that has now served me for 20+ years, 18 years now on a Whisperlite that I acquired for $5 at an REI "scratched and dented" sale labelled as "not working" (15 minutes of disassembly, cleaning, and reassembly, and it has worked without a flaw ever since - in my son's possession and use for the past 10 years), and among compressed gas stoves MSR Superfly, and a tiny Markill titanium 2 ounce stove. On the other hand, I have several stoves that have been tried and then stuck in the back of the gear closet after a year or two of struggling with their many flaws - Coleman Peak 1 International (lousy performance in cold weather and worse in rain), Dragonfly (requires too much maintenance to keep performance up to spec), several "simple" compressed gas stoves (nothing to go wrong? Hah!).
You might wonder at how I can use so many stoves - simple, just go camping, climbing, bike touring, and back country skiing a lot. Used to be I spent over 100 nights each year camped out. Then I retired, and all the volunteer organizations I ever associated with decided I had lots of time on my hands. So for the past couple years, it's down to 30-40 nights a year, plus the occasional expedition. And there are 2 in the household (was 3 for a while) who spend a lot of time in the hills and woods, and believe in gourmet dinners rather than freezedry (multiple burners for multiple pots).