I don't really know what to think of the Courier.
It's not that it's a bad ship per se, but i can't seem to spot its particular strength either.
Part of the problem may be, that with an estimated cost of 2 million, i still (maybe wrongly) compare it more to the likes of a Vulture than to ships in the cobra range. But that alone isn't it.
Weapons are sufficient but nothing to write home about, power distributor is certainly not.
Trading capacity is very low, even when not outfitted with combat specific modules like SCB's or utilities like fuel scoop and scanners.
Jump range is mediocre but borderline disappointing when equipped as a true multipurpose ship.
Speed and handling are okay-ish, but again, nothing to choose the Courier over other ships.
So regardless from which angle i look at it, i'd either take a Cobra for better jump range and more flexibility OR save up a tiny bit more and just get a Vulture.
Which fights better, flies better, and with my preferred Vulture setup even has more cargo capacity AND jump range...and all that in a combat setup (albeit without armor)!
I'd really have prefered if the Courier was a medium ship in the 10-12 Mill Credit range, where it would have been much more appreciated as a gap-closer in ship progression.
Edit: Oh, i forgot. Yes, it has got exceptional strong shields for such a tiny ship. But still not sure if that alone warrants the distinctively unspectacular performance in every other area.