I liked it. I think another review got it right: it's got a nice vibe. Sure, it's not the most modern but it was clean, functional and quiet. And a nice welcome from the owner. Three Rivers is not humming with excitement in out-of-season October and my eating experience was not fantastic but that's no fault of the Lazy J. The motel is a short stretch out of town so you need to drive to find a restaurant.

The not so good: It is a bit outdated, breakfast is poor and offered either after 9AM or in the evening before.
We used the second option as we rose early for the park.
The loundry machines were rusty.
The good: Clean room, nice beds, clean property, nice swimming pool, great location and surroundings,
Reception was okay, didn't help too much but was not asked for.
Definitely a good value for the price we paid

No motel rooms available so proprietor offered a cottage at motel prices provided we didn't cook. The compendium was full to the brim of helpful interesting history and other information. It took a while to read all the articles provided. Rooms were well appointed, and the grounds exceptional, in an otherwise dry and burnt landscape. Breakfast was available at reception to be taken back to rooms. (lots of healthy options available). Motellier pointed out roadworks in Np could delay our travel and gave good information about best times to arrive at road work area to avoid delay.
Generally a good experience, although morning came and coffe machine wouldn't work in plug in kitchen neither would toaster, I finally found a power point in bedroom that worked to operate these.

The Lazy J Ranch is a "50s" type roadside motel -- duplex cottages in a peaceful setting with green grass and trees on the south side of town. The rooms are basic and clean, but as others have said, need some serious updating. Towels are very thin. There is a pool, but we didn't try it. The ice machine works -- and in the hot summer temps that's crucial. It comes with prepackaged continental breakfast that is best left in the motel office where you must pick it up the night before. For a good breakfast, made to order, all the variety you may wish to have, go to the We Three Bakery on the north side of town, about the last place as you drive towards Sequoia National Park (beyond the ice cream place which is excellent).

If I were to go back to Three Rivers I'd stay somewhere else.