Advantages: 1 - Low price Disadvantages: 1 - The two main frames are made of a material similar to that used for electronic circuit boards. I suspect that putting too much stress on the screw from either of these could break the material. With normal use this may never happen, so my concern may be unfounded. 2-All parts are supplied unassembled. One reviewer stated that it was easy to assemble. I do not agree. If I had 4 hands it would be easy. The seller must send them already assembled. I fought so hard that I ended up tearing one of the rubber seals. The crack didn't prevent it from working, so I cut small slots in the remaining three bushings and screwed them in place. The cut doesn't seem to weaken their fit on the frame. 3 rubber bushings (shock absorbers) are heavy and stiff. I find them too rigid to do the job this shockproof device was designed to do. I compared them to the eyelets on my DJI Phantom II Vision+. Phantom jacks are twice as soft and flexible as this product. Therefore I cannot recommend this product.