I've never ordered from LPS and so I have nothing to add about their specific service one way or another, but I will say this: when there's been a problem with orders at other companies and they've been responsive to emails and calls, I've been understanding of the delay (honestly, any half-decent excuse will do, as long as there's communication and it doesn't feel like they're just delaying). It's when companies have outright refused to communicate that I've had a problem, and complained to people who were in a position to force the company to fix the issue.
-steve