I have an MSR XGK II
Sounds like a rocket burner when it is going, probably because it goes like a rocket burner. In nearly 20 years I have cleaned the jet twice (mine is the early version without the shaker jet) and put vaseline on the leather pump washer once. I store it with the pump in the bottle, without emptying the fuel. It takes a bit of practice to get it to simmer but will do it, it just takes a bit of getting used to. I have run it with kerosene/parrafin but, travelling with the bike, I just use unleaded these days.
MSR have a completely new version out now, and there are no doubt better stoves on the market, but it is a bit like an old friend. My mate picked up a mint shaker jet version on ebay last year for not much money. Worth a look.