Don't promise what you can't deliver
Wasted half a day waiting for someone to arrive with a very expensive battery. I had a 2-hour window. After waiting most of that time for an update I called. They said I would get an update in 10 minutes. Half an hour went by and nothing. Finally got a hold of someone in a chat and they said it would be tomorrow. Meanwhile I had placed the initial order at 12 noon. I could have found an alternative in the 4 hours waiting. Now I have to wait 48 hours for a refund! Don't promise what you can't deliver!