Fitting was straightforward with some trial and error. The cable runs are a little sharply curved for my liking but brakes and gears work OK.
I managed to fit my original Tioga bar ends by carefully sliding them up the bar to the welds. Note that they are reversed. They are not as ergonomic as they were on the original bars but they still give an additional hand position. There is a modified Mountain Myrricle attached to the RH one, which still gives a good rear view even though it is now inboard compared with the original fitting. The combined Shimano brake/gear levers were slid up to the relocated bar ends leaving space for the gear triggers to move fully. I used a set of drop bar foam grips from Halfords (£4.95) to cover the remaining grip area, trimmed to length. I still have enough left for another bar.
After a couple of 20 mile runs on a mixture of road, railway path and rough bridlepath I can report that for me at least the results are good. The wide bars are not such a problem even on the type of barriers found on cycleways in my locality: it is not hard to wriggle through. The bars at first seemed immense but I soon got the hang of riding with them. They give confidence on rough/ muddy sections, and allow the grip to be changed for more normal riding. I found that I could stretch out to the loop part of the bars going downhill or on the flat on tarmac. I have not tried them against a headwind yet. There is no problem in reaching the brake or gear levers.
As others have suggested, the extension needs to be reduced (mine is 9cm) to bring the bars back slightly. I also think that for me, the bars would benefit from raising slightly. I will probably try a stem adjustable for angle to address this.
The angle of the bars is about 15 degrees, which works for me at present.
I have cable tied an old camera bag between the main bar and the loop for now so that I can carry refreshments, which will be replaced with something more purpose made once I have decided on the final layout of accessories etc on the bars.
Hope that this info is helpful to anyone thinking of buying a set of these bars.