I have not shot one - but I saw one - actually a couple on the rack at the gun shop the other day and they looked nice, but I wouldn't believe everything that a gun writer writes about a gun - because after all that is their job and that is how they are paid.
If you already have a gun that you are comfortable with and does a good job, I wouldn't risk buying a new gun today and risking the chance that it isn't as good as what you already had.
Adjustable trigger might be good for someone that shoots a lot of targets, but real world experiences tells me that sometimes you shoot a deer when you see it and not when you are prepared to shoot a deer. When that happens - it really doesn't matter what kind of trigger is on a rifle.