I have a Jen Ken bead annealing kiln, I have the octagonal kiln with a bead door. I like that I could fuse a plate in it if I wanted, there is enough room for that. I have bricks filling in the back 1/2 of the kiln and mandrel racks in front of them to place my mandrels in. It has a Bartlett digital controller I adore! I can program 4 different programs into it and after baby sitting my old kiln while it ramped down for a couple years I decided to get a digital controller when I got this kiln. Money well spent!