The 08 Electra is easily the nicest Spyder I've ever owned. It comes with everything that you could ever need stock.
Barrel - very quiet and accurate. All of my previous Spyder stock barrels have been garbage, but I'm using the stock over any aftermarket that I have now. That's saying something.
Trigger - Magnetic, 3 point adjustable. Need I say more?
Board - Designed by Tadao, of course It'll be good. It has semi, PSP 3 shot (yes, 3 shot) and millennium ramping. Its not adjustable beyond that, but you don't really need anything else.
Regulator - I use a CP, but thats just because I already had one. I plan on trying out the stock one when I have access to a chrono, but that'll be a couple weeks.
Feedneck - I've never been a fan of twist-clamp feednecks, but it's better than the plastic garbage. It works, no real need to upgrade unless you're as picky as I am.
On/off - Wow. Works great, even tells you which way is "on" and "off." It bleeds out remaining air which is amazing. A great on/off to be stock on a Spyder.
Size - Very small compared to older spyders. Its about the same length as my friends PM7, just a little taller.
Like someone else said, you need to fool around with the wiring in the grip frame to get the battery in properly. Not a huge deal, but whatever.
You know the "high end" gun feel? You pick up the gun and it just feels different. The kind of feel you get when you shoot an Ion one game and a Marq6 another. To me, thats the kind of feel I got when I picked it up. Really solid buy. For 200 dollars you get everything that you might need and no need to upgrade from stock. I've shot most guns around this price range save the SLG, and the Electra trumps them all.
This is just -MY- experience with the gun. Do your own homework and make your own decision, because when the time comes you need to buy what you want, not what some stranger on the internet tells you to buy.