I have a jump/break from Arnot Q... It breaks good and jumps good. The wood he used (curly maple) was beautiful. It arrived in mint condition and was made from great materials and with great attention to detail. The tip is too hard to scuff, and I plan on replacing it with a White Diamond. The finish seems to be somewhat fragile, knicking very easily, and slightly cracking around the joints. It was also expensive.
Overall, I would avoid them. There are just too many great cuemakers that will provide a better product in the same price range.
Now, my cue was ordered a few years ago, and maybe he has/will change his finish (which is my main complaint with the cue). Give him a call and talk with him, he is very helpful.