My LSL's have taken a hell of a beating. There are 3 reasons I choose them over other sliders.
1) The low profile design makes it much less likely to crack the frame, or the bolt to snap off. Drilling bolts out and using easy outs is not as easy as it sounds.
2) The design of the crash pads that rotate to eliminate the bike from twirling and thereby keeping damage minimized and isolated. Seems to me that it'd also be less likely to flip the bike if it hit dirt or something like that. Low profile gives it less leverage. You can also replace just the pads at a fraction of the cost of the whole slider.
3) Probably the least important, but a deciding factor none the less is the style and color. The color matches the bike perfectly and adds to it rather than some of the standard cylinder style sliders.
Crash reports:
1)Went down at about 18mph, gravel in a uphill corner at around 1.5k miles. No damage to the frame, fairing. The slider pad had very little roughing up, nothing worth talking about.
2) Got taken out by a f-150 clipping my front end. The bike hit the ground hard as hell and slid under a neon's bumper. Most of the damage was caused by sliding under the car. The slider had some damage from hitting the ground so hard, but nothing too bad. The frame had no damage at all.
3) Low sided in a corner at the track at around 60mph due to oil at the bottom of the track. Bike slide smoothly and controlled into the dirt on the inside of the track(so did I). The fairing was ground a bit on the corner, the frame again was totally fine. The slider pad was ground down a good deal from the long slide.
Overall I'd recommend LSL sliders to anyone. They've worked great for me.