Things I liked: This rifle is very light weight with tack driving accuracy, now that I finally got the bore cleaned. The fiber optic sights at least for me are more accurate than with a scope, shooting quater sized groups on shoot-n-see targets at 30 yards. The rifle isn't very hold sensitive at all as long I'm gripping the forestock a little bit. Shooting prone, standing, kneeling, or bench shots, when you pull the trigger things just fall down. All in all it is a decent and very accurate small game air rifle.
Things I would have changed: First off my barrel came to me with lots of something caked in it. At first looking down the bore I thought it was rust but it was black. It just looked disgusting and pitted the entire length. I tried a bore mop and some JB paste to no avail. I ended up using hoppe's #9 bore cleaner and wearing out a copper .22 brush just to get most of it out. I then followed that up with a bore polishing using JB paste again. After that I pushed a patch with some cleaning solution on it through the bore and then dry patches until one came out white. Now with the bore finally clean I do notice some pitting here and there but since this is an exchange on another rifle and it shoots fine with the pitted bore, I'm not worrying about it. I do find it a shame though because Gamo has some great ideas and designs. The quality control just isn't where it needs to be. I would gladly pay a little more for tighter tolerances, better machining, and increased quality control on these same rifle designs. Like everyone else has already said, the trigger is very creepy. A small payment to Charlie Da Tuna fixed that problem though. Lastly, the click adjustments on the rear sight leave much to be desired. They could have a more audible "click" and be more positive locking.
What others should know: For all of it's minor shortcomings I still find it to be a decent purchase for the money spent. The Air Venturi Gas Ram upgrade is well worth the money. The rifle is very accurate and fairly hard hitting, even out to 40+ yards with open sights. Do yourself a favor and just order the GRT-III trigger from Charlie Da Tuna when you order this rifle.
Things I liked: Everything, really There is nothing new i can say that hasn't been said in all the other reviews. It's really a great air rifle.
Things I would have changed: Nothing at all without just really knit picking.