FYI the picture shown here on Amazon is of an older revision of the bench - every other website I have found that sells it has a picture of the current version. From what I've read, there have been three versions of this bench over the years.
The bench is very adjustable and made up of good quality components - thick sheet metal tubes, solid fasteners, comfortable padding. It is definitely solid and can clearly handle a lot of weight, but the bench is a little wobbly side to side due to the play in the pivot points in the frame. But in practice it really isn't bad, I don't even notice it when my weight is on the bench and I'm doing presses or any of the exercises that I do.
Assembly instructions are just diagrams, and to do it right, you'll need to spend a few minutes matching up the fasteners with the numbers in the legend. It's not difficult, just don't skip this step and jump right into putting it together. If you're used to working on cars and reading factory service manuals, it's really easy. Took me about 15 minutes.
This bench combined with the power rack makes for a versatile home gym. You can use them together for presses, or move the bench out to do squats in the rack, or use the bench by itself for lots of exercises. Much better than a fixed rack/bench combo.
In addition to the incline adjustments on the seat and back pads, the base of the frame has an adjustment with two positions that moves the whole bench forward or rearward. This is for use in the rack, where you use the forward position with the bench flat or declined for normal bench press, or the rearward position with the bench inclined for shoulder/military press. The bench needs to be in the forward position to be stable for normal flat bench press. If you don't put the frame in the rearward position for military press, you won't be able to move the bench far enough back in the rack to reach the bar (too far behind your head).