Fast rates of fire and LCD. Easy to use. Looks cool with my 4'' barrel and my 20 oz CO2 tank on there. Comfortable (this coming from a guy who likes to sleep on the floor). Looks intimidating.
Weaknesses:
Eats 9vs like a fat kid eating a cupcake. needs 9.6v rechargable. If its low on power then it wont fire on full auto it will stay cocked but the sear wont drop.
Conclusion:
Great frame. Great upgrade. I love this frame. I got mine for $145 and it came with a Spyder Compact 2000, Raised M-16 style sight rail, New bolt, PMI Perfect Expansion chamber.