I just got a Goliath last night. Built with a rayon wick 28g contact microcoil at .46 ohms because my standard 24g 2.5mm coil wont fit in the chimney. It's an easy build once you abandon the idea of cramming a dripper sized dual coil in there. A 26g 2mm coil might fit. There's a notch between the posts that would accommodate a larger single coil if thats your delight.
I kicked it off with a peanut butter and chocolate with bourbon vanilla and coconut, I DIY, 6mg max VG sauce at 35 watts. Great cloud production, the airfrlow is similar to a medium to large dripper and lung hits are the norm. My juice flavor is a bit muted at that power and build in this tank. It really comes out at 60+ watts on my Freakshow 24g 2.5mm coil .18 ohms with rayon. I bumped it up to 55 watts before I started to lose wicking capability, so for this build, I'm thinking I might want a different juice - fruit or mint/menthol.
All in all, with the 3+ ml juice capacity and both air/juice control, I'll be carrying this on my Sigelei as an alternative flavor hitter backup to my SMPL/Freakshow for when I'm out and about or I'm driving. It doesn't produce obnoxious clouds and doesn't require dripping. It's a great step up from my KFL and Taifun GT which were airflow limited. I don't see this as replacing a dripper any time soon, especially since it's so damn big in comparison, but maybe tweaking the build as large as it can go, it might get into the flavor/cloud territory of a dripper. It certainly has the wick and air to do it.