I have a softopper. Not good for a full time cap, but perfect for our purposes. I use it a half dozen times a year when we're on a family trip and we need covered "trunk" space. Then the rest of the year it just sits in our garage or shop. Takes about 10 minutes to install and 5 to remove. The only issue it had was the clear vinyl on the rear flap shattered on one trip when it was about -15. I was able to tape it up to get it home and they replaced it for me, but you do need to be careful opening it in cold weather (I wasn't careful - my fault).
If you only want a part time cap it's a great option. If you're wanting your truck to make like an SUV all the time I'd probably go with an ARE or Leer.