The advertised cycle time on mine is 15 seconds but like Greg, I only use about half a stroke and the ram automatically retracts when you let go of the lever. I guess they all do that but I'm not sure. HF also has a 24 ton model, also with an 8 hp Briggs engine. I don't know if it is the same engine model as mine. It is $899.
I looked at the MTD splitter at Lowes (like Greg's) and mine is built with what looks like the same heavy material. Both are well built. The MTD has a log cradle, mine does not. Mine holds five gal. of hyd. fluid and the MTD looks about the same.
The MTD 6 hp model was a verticle shaft engine where the Harbor Freight is horizontal. I don't think that would make any difference. The MTD model has fenders, that might be necessary for road use in some states. Mine has no lights and I don' think the MTD splitter had them either. I will not be towing mine on the highway so that wasn't a issue.
Another thing, the wheels on the Harbor Freight model don't use lug nuts. Not sure on the MTD model, but from the picture they appear to be the same as mine. The wheel and hub are one unit. You have to take the bearing out to change the tire. Still not much of a concern for me because I will slime them if I start getting leaks and I will not be pulling it on the road.
I went with the Harbor Freight model because of the extra hp and 16 gpm two-stage pump, plus no sales tax and free shipping, but I don't think you could go wrong with either one.
I have split some well seasoned oak (about 16") that I couldn't split with a maul, or sledge hammer and wedges last season when it was green. A lot of it had limbs. Really tough to split for a 53 year old with a bad back. This thing split it like butter. It also has NEVER failed to start on the first pull of the rope.
You have to assemble the HF model. You have to mount the beam and put the wheels on and pack the bearings, and you have to bolt on the coupler. Pretty easy but its a two man job to put the beam on and line it up for the bolt. Did I say this sucker is heavy? Plan to have help unloading it when the freight company brings it. Luckily I had a front end loader.