This is the iron I've got. Made a WORLD of difference in my soldering:
https://www.amazon.com/dp/B00AWUFVY8/?tag=lstir-20
This particular package comes with some nice cutters, something mine didn't have - and I paid $90 via a sale at the local Fry's Electronics. The price on it fluctuates anywhere from $90-$120, but it is perhaps the best investment I've made for this hobby - it heats up quickly, it has fast recovery, it is VERY precise, it comes with the brass cleaning tool and sponge to help clean your tips, it has the ability to change out tips to larger or smaller sizes (unlike the cheapie Harbor Freight jobs that do NOT work for electronics work), it's got a solid, well balanced iron stand that's hard to knock over (and has protection for the tip, so you can't easily and accidentally bump it and burn yourself like you can with many of the cheapie irons), AND it's well reviewed.
If you are going to do any sort of more precise soldering, such as on an FC or 4 in 1 ESC, the soldering iron is NOT something you want to skimp on at all, otherwise you're going to end up with lots of frustration and potentially destroyed parts due to too much heat going through it. I'd return the iron you have, spend the extra what, $25-$30 for this one - you WON'T regret it one bit. If you don't get this one, I'd recommend a Weller, albeit the Weller soldering irons are usually analog, using a potentiometer to dial in the temperature, as opposed to the more precise digital settings of the Hakko.