I am not a fan of Singh Farms, I bought way to much of their "best" composted soil. The results were poor the first year and after amending the soil the second garden season results were a little better now on season 3 and the garden is thriving.
I have heard from others that the compost from Singh is high in salt. I would recommend having the soil tested before a large purchase. There are also other options altogether.
I have lost confidence in the product here so I'm out.