Make = Then
you control the ratio's and what exactly it is you add!
Really cheap if your going to reuse/recharge!
Poke around and do some reading.
I and many others don't care for Rev's or Sub's soils = too much crap and tend to be either hot or short lived...
This is a nice place to start learning with a basic formula...How to!
http://forum.grasscity.com/organic-growing/1116550-easy-organic-soil-mix-beginners.html
I prefer my base like this.
1/3 Canadian Peat
1/3 Earth Worm Castings
1/3 Perlite (I like the little lava pebbles made for growing better - please use what works for you!)
20% by volume (of above) Composted Steer or cow manure (brings a different bio source for a broader or more diverse living bio heard)
Please make and use the nutrient and mineral amendments your own.