Worked for a guy who purchased a 26-103 swing seat brand new. Ran it a couple of times.
Good- Pilot controls have a pretty good feel. Greer LMI system is robust/easy to get parts for. If you're going to run it much/ trusses all day, go for a swing seat, foot throttle.
Bad- Not a great chart/ its a boom truck, wide outrigger spread (pretty hilly here and tough to set up) with out and down outriggers. Seemed to have a lot of frame flex also. This was one of the early Altec boom truck cranes (they've only made boom trucks 3-4 yrs.) and maybe the newest ones are better, but I wasn't impressed with the build quality. I'll be specific- the welds on the outrigger beams were simply poorly done. Also the plates on the top of the box of the beams looked like they were flame cut by a poorly set up torch. I can't see how it got past quality control. These guys make great bucket trucks, I think they were still learning. Guy sold it at a loss with low hours. National makes a better boom truck.