We ended our trial with $5.99 or $6.99 flat rate shipping in June. We would have continued it but we were experiencing too many delivery delays with UPS SureShip and some lost packages with no recourse. Our customer satisfaction is of most importance and the delays were just not what we want for our customers.
We have are now 100% using regular UPS ground, 2nd Day and Overnight service. Of course we continue to offer free shipping with 4 bags or more.