Very inexpensive, sturdy, cool looking. Great back up sidearm. Light. Fun to carry and use.
When you insert the tube of balls don't shove it in completely or the balls will not drop - push it in and then back a half inch or so. The balls in the tube should be a bit loose to start or they will not drop. 'Rock and Cock' is the order of the day. You should peek through the slit in the side as you cock it to ensure a ball drops until you get the feel for the gun.
I also have a PGP and I like it better. Half the weight of the nearly all metal PGP and all the power. Slider is much easier to pump than a PGP. New out of the box the first shot over the chrony was 275 fps. Most players commented they thought it 'harmless' because of it's plastic look and small size. Not terribly accurate for long shots but great up close. Be careful not to overtighten the screws as the plastic can crack (whoops!). Great little side arm. Lots of fun for night games. C/A adapter is available, but not needed.
Story: My spyder ran out of CO2 in the middle of a game with the usual very loud sputtering sound. A opponent came running full speed towards my position to finish me off. The look on the guy's face was priceless as I popped him with my 'harmless' Slider.
I gave it a 9 because of the sort of finicky way the balls drop from the tube. Otherwise a great little gun.