Just thought I would share this information since it is hard to find a box spring that actually has springs in it these days. I bought the IKEA Sultan Alby box spring(Queen for $150), this thing weighs over 100 lbs, my last S-brand probably only weighed 20-30 lbs. I looked on the website and it says it uses Bonell spring coil: Steel with 264 springs for Full size. Anyway, I also bought a mattress and pillowtop from IKEA so far so good, but I will post a review on it after I have used it for a few weeks. Here are the links if anyone wants:
Sultan Alby
Sultan Alekull (couldn't find a difference besides color and it is 3/4" thicker and $50 more)
Sultan Alby
Sultan Alekull (couldn't find a difference besides color and it is 3/4" thicker and $50 more)