Have the coppervape in Brass, Silver, and Black (obvious I liked it, but brass first). Have multiple plastic ones (Vandy, even coppervapes version) and hands down the BRASS coppervape is favored. I will not bother to gripe on the plastic mechs - but suffice to say the build quality is not substantial. If (HUGE IF) a single manufacturer would take the time and effort to build a plastic box like Geekvape did with the Mech Pro (internals and switch), then I'd jump on it, but in 4 tries of plastic Squonkers - I'm still using the Brass 4 to 1 over any other. Will say the coppervape's switch mechanism / style (BF ver 2 - the plastic one) is better - but the lock and the switch itself is poor.
Issues with the Coppervape BF v1 (the metal ones): The switch is chintzy (and wears over time - but cheap to replace). The switch mechanism / style is lackluster - and often needs cleaned / adjusted. The 'sync' as I will call it (connection of the top to the bottom via magnets) could have been done better - and often will need cleaned. Also - careful - the magnets are large - but not all that strong (tensile) - both my black and the brass have broken off - and stuck in the base - it killed the black one as both broke - but the brass still has one working - and still is in first place...
Voltage drop on the silver and black is much more than the brass. The brass is the only one I would buy again (and have).
Bottles are NOT the best - but they ARE standard 10ml bottles that most people have a pile laying around from when 10ml was the going bottle at the local B&M. You can easily find both PE and PET - I've not really looked to hard for others.
I've had over a dozen Squonkers, the coppervape silver and brass stay in the rotation - but the Brass is by far, the #1. If my lazy butt ever fixes the black - it will reclaim a spot as well.
One last note - skip the "kit" - and then buy a dead rabbit - being able to drowned the coils and wick with no leaking - priceless.
I have a 2nd replacement Athena coming this week (first was lost, second was run over by forklift I think - third is a charm), and I'll post here what I think. I've not tried the DS or any of the zillion they have on 3Fvape - I was on my way to buy an Hcigar Magic Box - but ended up with the Athena kit for the same price, and since I am overly impressed with my collection of GeekVape MECH Pro(s) - I ordered the Athena.
My personal opinion - the button and the link between positive and negative is EVERYTHING. The quality in the cheaper Squonkers is BAD across the board. A plastic case and a 'link' you can pull out - that is just an invitation for failure... The coppervape isn't too much better with the plastic button on a floating switch - but it works. One day I hope GeekVape takes a MechPro and simply adds a Squonker to it - as it is my favorite mech of all time and is built like a brick chithouse.