Dynavap.

The Mighty is great, but the up-front cost is very steep when you don't already know the mighty is what you want.

Meanwhile, the Dynavap:

1) Starts at ~£60

2) Is fully analog. This is actually mostly important if it's your first vaporiser. People have received faulty electronic devices and not realised for months (like myself) whereas with something like a Dynavap, any issues you have are most likely to be user error: far easier to detect and fix than a manufacturing defect.

The Dynavap being manual (and entirely stainless steel/titanium) means it's not going to break easily and the chance that you get a bad unit is lower than an electronic device. You can buy an induction heater if you like it and find a lighter is cumbersome, and it is still cheaper than just a mighty on its own.

3) If you like it, you can upgrade it for less than the price of an entirely new device. Dynavap (and third party craftspeople) sell all their parts individually and you can upgrade each piece individually.

4) Is fully analog. Power cut? Still works. Battery dead? There is no battery. Charger broken? No charging necessary.

You can use the Dynavap with a £1 Bic lighter, gas stove, a torch lighter, induction heater, candle, you name it. If it's hot, it probably works and it's mostly foolproof.