Summary:
I really do like this. I do wish I would have spent the extra for the FS110. I can run more attachments that I find myself wanting, if your only need is grass this trimmer is a beast.

Strengths:
Very light weight, love the 4-mix engine. Runs very quiet and has lots of power. Way better than the older models I had been used to. Starts very easy.

Weaknesses:
You need to make sure you have plenty of string hanging out to cut with or the head starts acting up. Stihl has a lot of other head options, I'm okay with the bump providing that I have a good 2" of string hanging out.

Summary:
performance dosn't matter if you can't start it!!!! i have an 039 stihl saw that i have had for 10+ years. no mater how long it sits i can start it in 3-8 pulls. i'm constantally messing around with this trimmers carburator. I bought it cause i wanted it to use it for at least 5 years. i should have bought a honda. i have heard a lot of bad stuff about the newer stihl carbs. I'm serously thinking about switching brands with all my small engine tools.

Strengths:
good horse power and runs at any angle. lots of attachments

Weaknesses:
carb trouble after about 2 years if not run every week.