I was considering getting one of these just to try it out. . . . .It's actually a shame that Makita doesn't make an 18v cordless chainsaw... I know others do but it would be nice to have a chainsaw to go with my other 18v lithium Makita tools.
I really like mine (UC4000). As noted, HD rents them (newer model now) and they typically sell off their rental equipment every 3 years or so. I bought 2 of these used for under $90 each. If you are not hung up on the blue color, I just saw the Dolmar version in red (to match BluntForgedEdge's collection) on eBay, new, for a little over $200 - a 'heck-of-a-deal' (as we say in MN).
Corded electric saws and battery powered saws really fall into 2, separate, niche categories. I can run the corded saw all day, and with more power, as long as I am within 100' of an outlet. Great for near the house, cabin, garage, barn, shop, etc.
The battery powered saws offer many of the same advantages (low noise, no starting problems, etc.), but are limited by battery life and power. Great for grab-and-go convenience, or smaller, trimming jobs. If I was looking at a battery saw for 'real' cutting, I would stick with the newer, 36-40 volt saws by Oregon, Husqvarna, STIHL, Bosch, etc.
Philbert