Super spiky puffer fish
MX2, especially the box press shape
It's worth it at the CI price. IMOI've only had some of the flavored ones (Eileen's Dram and Earth Nectar are good, Bella Vanilla was meh). I'm eyeing that CAO Dream Team sampler on Cbid right now, but it's only listed for about $3 less than what CI has it for everyday.