Weaknesses: Price, Only just fits on my frame (merlin malt 1)
Overall: my chainstay was getting quite a few chips and dents so bought a jumbo model, only just fits on my merlin frame. Think it looks cool, adds colour to your bike. every bike should have one.
Strengths: Seems pretty durable, have had it about a year now. Easy to fit.
Weaknesses: Will get thieved by skanky little chavs so vip tie it down. Really expensive for what is actually is, they give them away with MBUK, MBR etc.
Overall: Fit and forget, it does its job and looks rather smart if you get one to match the rest of the trimmings etc on your rig.