The x55 is a plastic HOTAS and an update to the x52 Pro. The main differences over the x52 is the addition of throttle springs, dual throttle controls & more knobs/buttons on both the controller and the throttle.
Ranked in these QuestionsQuestion Ranking
Pro Plenty of buttons/controls for Elite
The x55 is literally covered in buttons, which makes it great for a game like Elite which has a lot of complicated controls.
Pro Adjustable Stick Force
The x55 comes with 4 springs of varying resistance's to enable you to customize the force required to move the stick. The x55 also works with no springs at all, giving you 5 different resistance options.
Pro PC Gamer picked the X55 as the best HOTAS in this pricerange
Con Driver issues with AMD machines
People with AMD graphic cards have reported ghost button presses with the x55 as well as multiple button presses being fired when using TeamSpeak.
Con Poor quality control on some batches.
Reviews on the x55 are primarily mixed due the large number of faulty units people have received. It should be noted that newer units seem to be having fewer issues and it's possible the initial batch had a lot of faulty units with the newer batches being improved.