I saw Kev's video on Youtube about the review on the Coleman 533, and from what I saw, it looks like a very nice little stove, and it's reasonably priced, so I may consider buying it soon... But I want other peoples' opinions on the matter first!
The 533 seems a little big for hiking. Maybe camping with the family it would be ok, but for someone trying to conserve on space and weight - its bulky.
Some of my hiking / camping trips are as light as possible with just a poncho liner and a hammock to sleep with.
My 533 was brought on a couple of little cook outs with the wife, were we roasted some hotdogs, but that is about it.
It all depends on what you are looking for. The 533 seems like it is a well built stove, but for a light hiker, it weighs too much.
As for the simmering, - dont know, never tried it for that.