This is the best dip frame I have ever used. The reasons are numerous, but the main ones are stability, comfort and versatility. Stability: The frame is absolutely solid, constructed from heavy gauge steel, I can load up my weight belt with a 20kg disc and rep out with peace of mind, knowing that the frame will support me on the hardest of reps with whatever weight I chain to my waist.
Comfort: Each bar is one piece of solid steel and has been coated in a finish of some description, which, combined with being the perfect size, provides comfort on the hands and aids grip as you're performing dips. In the past I have used frames where the bar handles themselves are a bit small, or have had grips on them which have subsequently worn out and been taped over with gaffer tape. None of these problems can exist on the GymRatz dip station because the bars are the right size and the finishing coat provides all the comfort needed.
Versatility: the bars are not parallel. This not only caters for any size person, but also allows the user to target different parts of the body. For me, I use the most narrow part to focus on my triceps on arms day. On chest day, I'll go to the widest part to target a bit more of the upper chest/shoulders.

There was very minimal assembly required - the frame arrived as 3 packages containing 4 pieces in total. The two large dipping bars were heavily wrapped in protective packaging, which was the most time consuming part of unboxing, however I was pleased that they were very well protected during transit. In the third package was two horizontal support bars and 8 bolts. The assembly simply requires you to fix the horizontal sections to the vertical sections using the bolts. Extremely simple and extremely solid. Very happy with this, and it's well worth the money I spent to make sure I was buying top quality.