I used the 'other' similar system which is on the market with pretty good results for a couple of years but discontinued it's use as I've developed a "thing" about plastics etc in the hive/proximity to the queen. Probably unfounded worries, but I'm happy to continue on the road which I've chosen.
just to say in my 3 years beekeeping I used Jenter box fist and she laid in every cell, got about 8 Q's as a result. Last year, did the Clive de Brun course at Stoneleigh (excellent) and grafted, only to find brace comb covering the cells! So, this year I think I'll try the Jenter again, although I'm not sure the brace thing was down to the method of obtaining the material. More about a feeling of good luck.
I avoid the grace comb by putting a frame of foundation next to a frame feeder , this gives the well fed waxworkers something to do. I also grafft into cupkit cups- the cages are handy and its easier to graft than to get the queen to lay up the cells IMHO
Yes I do, I've returned to the way I was taught as a child -to be honest there was no real reason to change in the first place -other than a liking for 'new/shiny gear....'!! But as I said before, I had no problems with using the kit, and think that it could prove a worthwhile investment to be honest.
I use cupkit all the time, you have the best of both worlds, nice cups to graft in to in out apiaries and the full box if you want to use it at home especially if you are selective breeding, with cupkit the cages can be put on so if one queen emerges early you do not loose the lot, also caged cells can be put in an incubator and the cell raiser kept going. All depends on how many and what nature queens you want. But one of the most important things beekeepers forget is DRONES, its no good raising lots of virgin queens if you are drone culling for Varoa control. Queen rearing is a full package that needs planning that should have started last autumn