How is that Merlin MTL? I have Merlin mini that I use for MTL and I love it!
I haven't got the Mini, so can't really compare, but I like it. True hardcore MTL reviewers seem to thrash it, but it works well for me. But then, I prefer a somewhat airy MTL draw.
For comparison, if you've got a Siren 2, I usually run that on the biggest single hole or with 3-4 smaller holes open. Or Doggystyle fully open.
I think the flavour in the Merlin MTL is really good, but depends a lot on coil size and placement. (I usually have small round wire builds, around 1 Ohm)
What I do like about the Merlin MTL is that it gives you options and has a very nice deck to build on. The various air inlets allow anything from rather tight MTL (though the chamber is a bit too big for that) to DL.