Depends on how you use your nail/rig and how you intend on using the controller. I have a HN-02 and I do NOT just let it do its own magic. I use the programmable sequences (barely, but if they don't improve it I'll take matters into my own hands) to simulate uptemping (like an insert drop) and other techniques. For example:
https://i.imgur.com/HNVEX3u.png
I keep the nail set to 515, which keeps my obsidian insert at the temp I want to finish my dabs at (which is somewhere between 380-430; I have a cheap and bad IR temp gun). Before every dab, I press the top-left button to lower the coil temp by 40 degrees (F) for 30 seconds. Then I press the lower-left button to lower the coil temp by 20 degrees for 40 seconds (the -20 is in relation to the coil's main set temp, so this is effectively +20 from the temperature it was set to for the prior 30 seconds). Halfway through those 40 seconds, I put my concentrate in the dish, carb it, and start drawing lightly as it's barely bubbling for flavor. After the 40 seconds have elapsed, the coil then works its way back up to 515, and I dab as normal throughout this. I'd rather take several wispy rips at different temps than a rip that'll irritate my lungs. If I do really large rips I'll also use the +15 degrees button in the middle (for 15 seconds). You can press these buttons again once the initial time completes (or press it to interrupt at any time) so for REALLY big rips I'd press that button more than once. Sometimes I'll let the -20 portion go for the entire 40 seconds, press it AGAIN and put the concentrate in THEN. That's really good when I put in a large amount, or multiple types, and want to spread it out across the insert.
Sorry for the essay. The point is, if you are willing to put in the time (and dabs) to figure out how to get it exactly the way you want, it is absolutely worth it. That being said, you can still do uptemps just fine with a standard PID using the drop method and/or power toggling. Where the Hex (I haven't tried a KubeOne, but I have an AH coil and banger and they're great) outshines is in its consistency. Sure, you can change temps or power toggle to get similar effects with a standard controller, but being able to get it precise and consistent (I don't know how accurate the numbers displayed are; I just know that when used the way I explained above I get my ideal dab every time) has made my regular dabbing experience significantly more enjoyable.