Enginer reliability and expected life

I know the Enginer kits haven't been around long enough for warrantys to expire and that they are continually upgrading their products and designs (which may mean my question can't be answered) but I'll ask it anyway

1. Whats the general concensus on PC on the reliability of the Enginer kits?
2. How much life does Enginer/customers expect to get out of their kits? (e.g. based on fully depleting the kit and charging it 5 days a week)

Thanks.