Things I liked: Awesome air rifle that delivers excellent accuracy, easily adjustable power, fine workmanship and quality. The power wheel allows low velocity for 10m shooting and high velocity for extended ranges beyond 50 yds. Also, the rifle gives a high number of shots per fill on half power with very useable velocity to 40 yards. The rifle does not seem to be pellet fussy. Accuracy at 20 yds and 40 yds has been impressive. The balance, feel of the rifle, length of pull, and comb height are spot on. Pyramyd customer service has been second to none.
Things I would have changed: Noise reduction could be improved through a better baffle system. The location of the safety needs moved off the trigger, as others have said. The fill adapter fits tightly when new; a foster style fitting would be preferred. Offer a version with a true match trigger.
What others should know: The trigger is decent from the factory but still has some sticking points which are very predictable. It is good for a sporter rifle, but not at the level of competitive match rifles or custom triggers. This model is a single shot and it is very easy to load the pellet evenly each time without worrying about alignment tolerances of rotating magazines. If you require fast follow-ups, get the S510 repeater.