Thanks for the complements! It's a bunch of work (especially with my screwed up spine), but I know this will pay dividends for decades to come.
I've only got the brush cutter and a 34cc chainsaw from them, but that saw is a joy to use and I've owned it for about 3 years.
So this brush cutter - I'm half way through the second tank (a tank lasts 2+ hours of pretty steady tree lopping), and I'm very impressed so far! I was told by the tech at Doug's Power Equipment (great place to do business with) when I picked it up that I should be able to turn the choke off before it stalls out. I responded with "I never get that on my saws" and he looked at me funny. My echo chainsaw takes 5 pulls on choke cold, then fires off on a single pull after choke is disengaged. Always starts like that. Always starts easy, but it always follows the cold start procedure. Once it's been run enough to warm up a little, no choke is needed the rest of the day and one pull will fire it up. Same with my Husky and Jonsered's - that's just how I tune them. So back to the brush cutter... One pull on full choke (as long as you didn't run out of gas, then it needs priming), it'll run bogged down and idle there while you flip the choke off. That's it!
How does it cut? Freaking awesome! I wore the teeth off the new heavy brush blade (not the light brush one it comes with) and still kept dropping saplings. Granted, I was stump cutting red and white oak and that's not easy on chainsaws either, but she never seemed to care; nubby blade and all.
With 43cc's, it winds up very fast. It doesn't need full throttle to handle smaller plants, and with full power you have to mash it into a trunk to make it struggle (with a dull blade :D ).
The harness it comes with is a bit awkward and doesn't lend itself to rapid ingress/egress, but works well enough once on. I'll likely switch to a shoulder strap and skip the 4 point rig, but then I'm also not using it 8hr's day after day like a Pro would.
Vibration transferred to the user is minimal. I couldn't run my FIL's straight shaft (70's vintage) Stihl for 20 minutes without causing my nerve damage to wig out my hands, but I had no symptoms after 3 hours use of the Echo.