I used it with a Vision Rack, although it may have been a different brand of cable. I like it.
If you can't router a groove for the cable to rest in I have another suggestion. When you build your racks have the gaps be about 3/16" wider than what you planned. Then find some 3/16" hardboard or other material and attach strips of it to the shelves. The heat cable can then wind inbetween these strips and the boxes will slide on the strips.
First thing, order the cable and then pick out a material that is slightly thicker. Then build your racks with the thickness of that material in mind.
I don't know if the specific product you mentioned will get hot enough for BP's.
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Current snakes:
0.0.1 Gonyosoma oxycephala - Java locale (green)
0.2 Gonyosoma oxycephala - Malaysian locale (green)
1.2 Gonyosoma oxycephala - Java local (green)
2.2 Gonyosoma janseni - Seleyar locale (all black)
1.2 Gonyosoma janseni - Celebes locale (Black & Tan)