Now that my hand is permanently damaged from a car crash, I can't shovel, pick, or even use a big rototiller in a straight line. I can't even squeeze the throttle cable on a local rental. However, I can use the FG110 long enough to get tired for other reasons; it is the easiest rototiller to use (perhaps in existence). Vibrations don't rip up my hands, the pull start is easy, it is light but not so light as to jump like a rabbit (problem with the light electric model by another company), and because it is so small, I can use it at all kinds of angles and drive it right out of a hole - where I'd be stuck if I had a big unit. It basically replaces all hand tools for me, then I can follow up with hand tools after the soil is broken up.
Also, being a four stroke Honda, it idles ~3500rpms quietly, and need not be used at full throttle depending on the work you are doing (but quieter at full throttle than most similar equipment)
Change oil more often than they recommend at first, since at 2.7oz it is cheap to do, so that the engine breaks in nicely - it went through quite a bit of metal shavings and turning gray fast, but I change the oil every time I cleaned up the machine, and now the oil is looking pretty good. I found forum entries on the engines dying when almost brand new (almost exclusively) - so I took this preventative measure to break mine in well.
As just told by a repair shop, if you don't like the pins that hold the tines in place, you can switch them to (#8?) bolts and lock nuts if you don't generally take the tines off, and with "trailer pins" if you clean the tines often. Also, oil the axle so the tines don't get stuck.
More power? Only install two of the four tines for the job, either facing in (safe) or facing out (really powerful).
Dust? Be prepared to clean and re-oil the oil-type foam air filter more often than you would expect if you work in dust. That's a weak point - make certain the cover is snapped completely back into place to avoid dirt getting into the engine by bypassing the air filter. Be prepared to maintain it daily while breaking new ground.
Great machine, I'd highly recommend it for all small/medium jobs, and even one-time initial cultivation of a big garden, letting it rest and check it periodically - or rent a monster for a day and follow up with this unit.
Optional accessories are prohibitively expensive, so don't buy it thinking you'll get all those additional functions. However, what comes in the box is plenty.