It is a bit like a slab, but I wouldn’t use those pots again. I would go bigger, I just am not sure what pot size to use, so I’ve been going through several sizes- next grow will be directly into the final pot or paper cups.
Transplanting was awful, they shot tap roots through the drainage holes on several, and very little horizontal rooting. I’d have been happier starting them in the 1 gal fabric pots they are in now, lol.