Their pictures and descriptions are so vague it is hard to know what you are getting.
We don't have torsion bars or leaf springs or shackles etc.
If the pics in your selection are accurate it appears to be an outside the strut spacer which many will attest is not the safest lift on the market. It is also getting close to the point of giving you front CV axle binding at full droop.
here is a poll of the lifts most are running here
viewtopic.php?f=15&t=2646&hilit=pollMost folks are running either the BDS kit or one of MarkMCs kits.
If I were buying a kit now I would go with MarkMCs 3 inch kit which I think is only about $260.
If you are a real cheapskate like me or if you really only wanted 2 inches and level it out you could go with the Rough Country kit that is on sale for like $129 now. Both kits replace the relatively weak factory upper strut mount and have been wheeled a great deal with very few issues. The BDS kit is also reported to be a mighty fine lift wheeled by many on this board. It is similar to the RC lift but a little more expensive. BDS is also the only company out there to market shocks for us in the rear for our lifted platform.