JoyeTech and their Eleaf and Wismec subsidiaries have been an absolute steamroller the last six months with their firmware updates.
No one else comes close.
And it's not bug fixes... it's consistent, useable features, added value.
But... that just
has to start slowing down. What's really left to add?
I think Kanger is out (for now) because of their still dodgy take on TC.
SMOK is getting a good amount of love, but the latest I have of theirs is the xCube.
I only have the D2 from P4Y and despise the menu, but you can't ignore their ~150w mods.
For budget value though, I just keep coming back to the JTech stable.
And don't dismiss the 100TC. First week, the firmware bump was to 120w. High enough?