Things I liked:All metal, including trigger, trigger guard, and hammer. The part that pierce the CO2 is way better than Crosman. The CO2 drops out easily. Shoots 9 clips on one CO2. Smooth trigger, love the single stage.
I love how the CO2 knob is spring loaded to turn flat when not needed. I like that the slide safety is plastic to not to rub the metal frame too much and since it's the part that sticks out the most, it will not get scratch when laying on that side. Love the attention to details of this gun. Also, the lanyard loop on the grip is metal. Quality gun. Things I would have changed:Make the trigger less spongy feel, this is just me being picky. What others should know:Here's a solution to the loose grip problem. I taped a piece of black electrical tape between the frame and the grip. The elasticity of the tape bites on to the inside of the grip as I hold the gun. To remove the slight back and forth slop, first removed the grip completely. Then I used 2 strips of blue painters tape on the back of the frame. Now the grip feels like it's bolted on. I then lift the lightly to free it from the tape before sliding the grip back to replace the CO2. Finally, if your slide rattles, remove the slide and turn the spring around.
Umarex should make a nice presentation box for this gun.