I ordered a Kannastor vape gr8tr a little while ago (15% off labor day sale brought it to $60+shipping), and I finally got to try it last night. So far, I'm really impressed!
Packaging: Pretty slick.
Assembled: Probably about the same size as a 4-pc SCS
Grind: I
really like the grind - finer than the SCS/SC, but not as fine as the MFLB finishing grinder. Super consistent, though. It also doesn't require any grinding upside down and then flipping. Just drop it in, close the lid, and turn. Too early to say, but I suspect being able to keep this grinder upright at all times may help keep it from getting gunked up.
Gr8tr, SCS, and SC: Teeth are much shorter and holes are much smaller on the Kannastor. The Kannastor's grinding chamber is the deepest, which I think makes loading a little easier - no worries about bits falling out or anything like that. The grooves on the male part of the gr8tr are supposed to reduce friction and collect gunk - again, too early to comment on whether that's effective, but it seems plausible. The 3-pc SCS bottom is deeper, but the gr8tr's capacity is more than sufficient for me.
Other stuff:
-The Kannastor has extra storage in the top - dunno that I'd ever use this, but it does utilize otherwise wasted space. However, I do like that the black lid can be used with the bottom part of the grinder to create a storage puck.
-These grinders have interchangeable grinder plates, but this model only comes with only the fine one. Not sure I'd bother buying the coarser plate, as this one suits my needs just fine.
@Mulehead I'm really interested to hear what you think about the gr8tr once you get yours!