I've had kicks and ended up never using them. This is much more useful if it works well with your form factor. Remember you said for side-by-side, some of which, like Black Oak, have lots of room for it. If you change your wattage now and then, accessing the pot on the kick can be annoying. Here you get easy button access, wattage/voltage regulation and battery readout. Also, you get to keep your 3000 mAh battery instead of downsizing to 1100 mAh.
I couldn't resist the price and just ordered one. Got a few rigs it would fit to nicely.