Several years ago I picked up one of the Titec Jones bars...back when Titec was still around and had some sort of licensing arrangement with Jeff Jones. The Titec versions were more affordable than the "real" Jones bars of the time. My version is the "H" bar...it was of the Jones design, with a rise and a "cut" (not like the loop bars). The Titecs were optimized for single speed setups as they did not have tons of room for shifters, but I took a gamble for touring as I planned to use the venerable Shimano XT thumbshifters for an 8sp setup. The thumbshifters fit on the bars no problem with plenty of room for grips/hands, etc. Another nice plus was that the size of the "cut" on the bars fit my medium sized Topeak handlebar bag perfectly...like it was custom made for the bag. Just perfect.
In touring use, the Jones Titec bars were pretty good but not great. Biggest issue was some occasional numbness in my left hand. I tried different stem lengths and heights to address. Only thing that really helped was adding some Ergon grips to the outboard area of the Jones Titec bars. Also I wasn't thrilled with either of the "inboard" position of the Jones bar on the touring bike...the angled "flats" really weren't that comfortable and the aero position seemed too narrow to have confident control of a loaded touring bike. When it came time to retire that touring bike, I moved back to drop bars on the new touring bike...although I am using a wider variant of drop bars suitable for dirt roads that perform great for road and dirt touring.
As to the Titec Jones bar, I eventually moved it over to my MTB and it works great in that application. My MTB is a 90s era high end steel hardtail with suspension fork...definitely not the Jones paradigm for off road riding. But the handlebar is fantastic on that bike...great control in all situations, uphill, downhill, etc. No hand numbness. And the aero position works great on the MTB...super stable. Was a really nice option when riding the MTB on the Montana section of the Great Divide route...nice to have the aero position on the smoother sections of dirt/gravel roads when the winds kicked up.
So I think a Jones bar can be fantastic but a lot depends on proper setup and the geometry of your bike, etc. Nowadays Jeff Jones offers many versions of his bars, and he's made many refinements and changes over the years (e.g., longer grip area, more room for shifters, etc.) They are definitely worth a shot.
