"A piece of climbing gear you don't trust 100% is probably best retired or simply destroyed. eBay is not a good answer here."
Dane Burns @ Cold Thistle
The full BD report is well worth the effort and the read imo.
QC LAB: Gear Doesn’t Last Forever – CRAMPONS
Bottom line from Black Diamond
• Horizontal front points are best used for the alpine.
• Flexible center bars can increase the lifespan of your crampons, but at a cost of performance.
• Boots aren’t as rigid as they used to be and break down/wear in quicker.
• Use flexible center bars with truly non-rigid boots.
• Gear doesn’t last forever.
A crampon and boot combination I really like on steep water ice. But not a combo either I or BD recommends.
Average Cycles to failure: 12,312 +/- 3,047
Sabre Pro CrMo
Average Cycles to failure: 15,079 +/- 2454
In summary, the CrMo fails after completing 23% more cycles than the SS.
A rather esoteric boot here in North America, the Scarpa Phantom Ultra.
Because of this year long discussion, my current crampon choice, with a rigid center bar and this boot is obvious in the masthead photo and below, Petzl Dartwins. While not perfect imo they and the Dart have no significant history of failure that I know of with any boot combo.
" Flexible center bars can increase the lifespan of your crampons, but at a cost of performance" BD QC