LOVE THEM! Have had them since last May (ish) and they are awesome. Very comfortable and the "horns" are perfect as they are where I have my hands a lot of the time on drop bars (maybe a touch narrower than my chosen bars but not a complaint). I have about 1400 miles or so with them (I couldn't install them right at the start of owning the bike so not sure the exact mileage but at least 1400 miles on those bars)

Get the GC1 grips of course and I found that the ESI grips, while tougher to install, are quite comfortable on the "horns". I keep thinking maybe a more ergo set up of some sort would be cool but I haven't figured a good way to do it but I haven't had any discomfort or anything like that I just don't like round stuff and prefer an ergo profile.

My one gripe for you would be that they are not compatible with thumbies, so you couldn't swap your old bar ends to some Paul levers and make them work unless upside down but things might be odd in that position. However a trigger shifter is just fine in the end. In my usage I have an electronic shifter.

My general gripe is that Koga has no interest in selling them realistically or they want to keep them exclusive so people hunger for them more but we wanted to get them in the U.S. and they wouldn't sell to us as a shop. I am curious now to try the new Velo Orange Crazy bars as I think they said ok Koga and Alee we see you and we raise you 20mm. I hope it will be a somewhat on going war between them to make the bars ever so slightly better every few years. I think the 2nd gen of them looks really promising but no plans to get rid of the Denhams yet as they are so great.

I really cannot find anything I really dislike about them that I really dislike about them, occasionally yeah maybe a little wide in some situations and sometimes a bit narrow in some situations but in normal usage not a problem, when weaving through a car or trying to mount stuff towards the outside it can be less than ideal but I made it work and work well.

In terms of brake levers Avid Speed Dial 7s if you want cheap but good and Paul Levers if you want really good and super smooth (and MUSA) but they aren't cheap. Obviously if you are running road stuff then the SD7s aren't what you want but Paul makes levers for both that are great and for road stuff Shimano Tiagra levers are probably the best of that bunch (as you cannot find higher end stuff still in production from Shimano)