We have a berserker enthusiast
@JCinFLA !

It's okay, I am one too.
I actually run my berserker in the "short" configuration, to me the vape is better and 0 issues with gurgling with topfill. I agree to an extent about the 2 ml being on the small side, but I must say, this is one of the most unthirsty tanks I have, and even in 2 ml configuration, I am not refilling all that often, not as much as say, my 22 mm 2 ml Siren V2.
I'm really a fan of smaller sized tanks for flavor but if you get ANY 2 ml tank and are worried about refilling too much, I would probably say the Berserker is one of your best bets as far as not doing that For me, the tradeoffs of the larger size (I did try both and knowing what I know now, I'd probably get the 22 mm tank, though I'm not willing to spring for a new one. But, the 4.5 ml configuration wasn't
bad either, it just wasn't as good as in the smaller configuration (for me) and I'm pretty certain the 4.5 tank would last you a fair amount of time.
Anna