I bought single pair Products of Wolfcraft and may actually already generally say
"Good idea, poor workmanship = Wolfcraft"
For me the best is Wolfcraft among the cheap products. For this, however, they can be paid better.
I bought the dowels Help and equal tested. There is a need in any case a lot of practice. A precise schedule with the help of corresponding marks had not succeeded. In stop it work, but once you want to drill the second dowel hole makes you wonder how actually the second workpiece that can attach to the well-defined point. In the thickness / depth centered in a workpiece to drilling successful already at the first attempt, only the right or left of another drill dowel holes and that's all workpieces the challenge.
I still have not figured it out, is likely to be the solution, "practice, practice, practice ..."
The case is bllig and also makes a very cheap impression. In case slots are provided for three drill, it should probably 1x 6'er, find 8'er 1x and 1x 10pin drill place. I certainly had three 6'er drill. But however 1x 6'er each, 8'er and 10'er Aufstechbohranschläge.
An affordable alternative I had not found, so buy this product. About satisfaction I do not want to talk but at this mark I set no great quality.