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They seem like a pretty good buy. 13 pts for 3 S5 I5 attacks charging.
Say I have 9 of them, costs about 117. Compared with 6 Bezerkers.
Scouts gets 27 S5 I5 attacks on the charge compared to 24 S4 I4 attacks. Even not on the charge they both have 18 attacks.
They also have 9 wounds with 4+ save (9*0.5)compared to 5 wounds with 3+ save (5*2/3) which is better.
na, i only use normal scouts for my blood angels (with lots of sniper rifles, great for taking ou those pecky things), and there is enough with ap4 that they get wasted.
Back from a long adventure.