My logic was that OE ones were too expensive and others too cheap so I went somewhere in between and also assumed that the Dunlop rubber would be decent quality, right or wrong , we’ll see ! If you can get a pair for that price then all the better.
As for fitting them, anyone who can use a spanner without needing a manual should find it straightforward.
Watch the YouTube videos, jack the car up safely, take your time, don’t over tighten the pipe unions and it should take you about 20 minutes or so. I don’t have software to deflate etc. so just drilled a 5mm hole in the bag to start and the car inflated by itself when done. Probably saved a lot of time anyway.
One tip, which I know might be stating the obvious but , DO NOT stretch out your new air spring before fitting it, you will regret it ….. 🙄 !
Good luck and happy fitting