Pros: Cuts wood like a hot knife through butter!
Cons: Only 5 year service life.
I had my Stihl MS290 Farm Boss (similar to the Stihl 029) for five trouble free years, then everything went bad at once.
I bought the Farm Boss based on comments on misc.rural. The saw was much easier to start than the "Eager Beaver" it replaced. A cold saw required two or three pulls until the engine tried to start when choked, then set the throttle to "fast" and it would fire and run on the next pull. Once the machine was warm, it would always start with just one pull with the throttle in "idle".
Cutting wood is a pleasure. I opted for the 16" bar, as none of our trees are very large and it makes limbing easier. The balance is good, and the single lever control is easy to find. The handle could be a bit larger, I can just barely get the toe of my boot in to hold the saw for ground starting.
Like all gas driven chain saws it's loud, hearing protection is a must! I also wear steel toed boots, hard hat, eye protection and chain saw chaps when using the saw. Some people think that the chaps are "geeky" but a buddy of mine was required to wear them when he worked for the US Forest Service, and the chaps saved his leg when a snake came out of the brush and startled him while he was cutting.
The honeymoon was over at the beginning of 2005. The fuel line cracked, causing the machine to suck air and bog out. Got that fixed. After felling and bucking six cords this Summer the saw is now showing signs of poor compression (hard to start, won't idle properly). I think that I wore it out. To be fair, I didn't always use Stihl two cycle oil, but whatever two cycle oil I could find on sale, this may have contributed to the short life span.
I expect to get ten years out of power equipment before having to replace it or do major repairs. If it can't be repaired for less than half the cost of a new saw, I'll probably upgrade to the Stihl MS310 or consider getting a Husky.