I tried a friends light blue 03 shocker, and found it really light and accurate. But the biggest surprise was the trigger, I would not describe myself as a fast trigger puller, but with the shocker, oh baby, I RIP.
It was this "fast" trigger that made me sell my eblade and get one,
I got a second hand light blue one, so dont know if the previous owner had any problem setting it up. I just put my bottle on and let rip. The shockers do suffer from First Shot Drop Off, and crap air efficency.
The new bolt kit from "Evolve" or "Newdesignz" sort these problems out.
Also the FSDO can be cured by resetting the dwell, if you can not afford a new bolt kit.
I was so impressed with my "new" shocker that I sold my "spare" Timmy and bought a new dark blue shocker.
I have had no problem with the dark blue shocker, just attached the bottle, set the max flow and off I went.
There are people who have broken the little on/off switch, and the barrel's are a bit fiddley to screw in, but thats all I have heard about.
I love the marker, and would reccommend it. Try before you buy and you will not be dissapointed. There are a couple for sale on these boards(go davo)