ive vaped about 30ml since last night through the Crius, at first the mod felt small in my hand but as the night went on and this morning i am finding a couple of comfortable ways to hold it, you can thumb fire this aswell which im finding comfiest, the angled section above the fire button is great for resting your thumb on between vapes, it may be sheer luck but the threads on mine are tremendous as the airflow for the crius sits exactly at either side of the mod. On my Aegis it doesn't nor on my Smoant Charon or either of my Ijoy Captains. Simple things like that for the OCD are amazing