I've used a manual reel mower for 4 years now on 1/3'rd acre lot & I like it. It's light & nimble. Cuts pretty fast. It's nice & quiet and it starts on the first pull, er push, every time. It's just simple. Oh, and it spreads the clippings out nicely so they nearly disappear into the grass. No winrows of grass like a side-discharger.
But (there always has to be a But), there are some things it won't do well or at all:
As mentioned, if you let your grass grow more than you should it will be hard to push the mower through & half the grass will just lay over as the reel passes harmlessly over-head. So you kick yourself & go over it again in the opposite direction. No big deal. UNLESS you let it get really long. My lawn is a fine-bladed Fescue that grows like crazy in spring & if I let it go too long (like I'm on vacation or something) it just falls over & the only remedy is to ask a friendly neighbor to borrow their gas mower
. This has happened twice.
The other minor Buts are: It will stop dead in it's tracks when it hits a stick. Even pinky-sized twigs.
Because the wheels are mounted outside the blades it leaves a wider uncut strip around obstructions & borders.
If you are one of those neat-freaks that bags all your clippings the bagging attachments on these things are basically a joke.
Long weed stems often escape being cut.
Mine is the TaskForce from Lowes, but if I were buying now I'd go with the newest Fiskars. It can be raised to a 4" cut height to get that grass that you let grow too long (huge plus). It has the wheels mounted behind the blades so you get closer to obstructions. It's bigger, heavier blades are supposed to act kinda like a fly-wheel to cut through weeds & twigs.
Mine has never been sharpened but still cuts fine. The sharpening kits they sell are just sharpening paste and a handle. You take off the one drive wheel, paste the blades & turn them backwards with the handle (or your power drill
).