OT: Anyone with a Simmons Beautyrest Mattress?

I seem to only be starting threads asking for advice on big purchases lately!DH (dear husband) and I are looking for a new mattress. We were very disappointed by the longevity of our last mattress--it was pricy, but developed body impressions within 3 years of purchase and the body impressions are now very deep (the mattress is about to celebrate its 7th anniversary with us).

I also was miserable trying to sleep the entire time I was pregnant because of pressure point pain in my hips, so I'd like something that cradles my body a bit better for next time around.Our favorites for replacement so far are all Simmons Beautyrest. We like really soft beds and they offer a lot of nice models with the pocketed coils and very plush pillowtops.

So I'm interested in hearing your reviews. Anyone have one of these? How long have you had it and how has it held up?

Can anyone compare the Beautyrest experience to Sleep Number or TempurPedic?