Just complete excellence!!! The quality is outstanding and functions just as well. I was at first hesitant sure, so I purchased the semi-sphere to kind of test the waters per say and was blown away. Saving up now for my new insert. Get ya one!!! It will change your entire experience.
I love the retention and esthetic it brings. Fits in my inserts, chamer, slurper. It does wonders.
Perfect lil add on to quartz bangers or used as valve in slurpers or combo it inside the inserts to add some surface area/heat retention for those globs!
Prefer this over the amethyst ruby because it holds even lower temps!
This beautiful gem really does help with heat retention. As others said if you can't afford an insert this is a good substitute and together fantastic.