I have had several VMod XLs over the last, what, 3 years, and they are my daily vape. They are inexpensive. I wait for the sale and they cost around $50. They hold 5 ml (the bottle holds 9 but I like it better half-full). They are mechanical, use whatever 18650 batteries you like. They use any standard 510 atty. The feed mechanism is brilliant: a slight tip now and then, and they feed into any standard 510 atty with NO tube! The taste etc is a function of the atomizer. I use the expensive HH357 atomizers, that last me 2 months or more and taste excellent. They are compact and very light. The little guys (the V2 with 14500 battery) are tiny. The downside? They are lightweight construction and the battery is heavy enough to pound the internals when you drop it. They can crack. I drop them a lot and know a few more obscure failure modes. Interestingly no problem has ever disabled a unit, I can always patch them up and make it to shore. So, they are inexpensive, practical -- and not eternal.
p.s. Their blue batteries are very short-lived. After less than a month they charge up to 4.2 volts but fold under load. Their low resistance atomizers are now quite good. The graphic "skins" are pricey unless on sale, they look great at first, then the rubbery material wears off on corners etc (see "I drop them a lot" above). So the logical package I get is the raw "a la carte" VMMod XL, a spare bottle pair and an o-ring set ($5 total) and a pair of 1.5 ohm Bottom Feed atomizers.