I absolutely love my .177 coyote. I used it at the pyramyd air cup this year in hunter class. Only had it a couple months before competing. After the competition, I worked the trigger until I got it about as nice as my marauder. For a "less expensive" gun it's incredibly accurate. Those BSA barrels are all they're advertised to be. I can't wait to use it next year at the cup. Shoots Kodak 10.65 at 930 average for 45 shots then it starts to open up a bit. For plinking I'll shoot 60-70 before refilling. It's not internally regulated but the valve is very efficient. Besides the trigger work and removing the barrel band, mine is stock. It's not advertised as having adjustable hammer spring tension but you can change preload with a 4mm hex. Just remove the plastic cap on end of air tube/trigger set under action.
I will probably keep my coyote forever but I have a couple Hatsan at-44s that I'd sale if asked. One is a .22 non QE short model and the other is the .25 long QE model. The only thing better on my hatsans is the trigger. Neither perform as well as my coyote in any regard or my marauder .25 for that matter. Some have great luck with Hatsan but my best one is a .25 break barrel. Good luck with your purchase. This is my experience and opinion, others will disagree. Every rifle is different and maybe I got a great coyote and two bad hatsans but I'd buy another BSA/Gamo pcp long before another Hatsan.