Perfect Fitness Abdominal Crunch & Sit Up Trainer - Portable Home Gym Equipment for Core Strength & Abs Workout - Ideal for Home, Office & Travel Use

SHIPPING: 2 day ship (Amazon prime), was packed good to where no pieces were tossed around.ASSEMBLY: super easy to put together. Took me less than 10 minutes. The only one tough part was when you are putting the second handlebar in, the fabric pulling makes it difficult but I figured out a way that makes it a lot easier. And that is Shown in the first picture. I do not put the fabric all the way down into place until it is fully assembled. If you push the fabric up when you are putting that second handlebar in it is a lot easier and it pretty much goes right in. (See photo one)You will know what I mean when you put it together. Don't put the fabric all the way down into place until it is fully assembled. The Allen bolts screw in easily. The Allen wrench works great. In some areas you just have to adjust to where the holes are lined up but that is anything you are trying to screw together. it seems wobbly and misshapen when you are putting it together but when you put that last piece in it just makes everything strong and sturdy and everything just comes together nicely.USE: do not expect the part where you put your net to be like a harder Contour pillow. When you put your head on the mesh part it does give a little. If you need extra support in that Arch on your neck like I do I put a small towel there and it seems to give me the support I need. I had a neck injury and it is healing up, if my neck was not sore at all and everything was back to normal I would not even need the towel this would be perfect for me without it.SITUPS: when you use this you can't rely on this piece of equipment to do the situp for you. You have to do the situp and use your abdominal muscles. If you are pushing on this piece of equipment to pull you up, it's going to move and slip and slide on the floor. If you use your stomach muscles and just use this machine as a guide for you it does not move at all whatsoever. All the parts that touch the floor have like a rubber grip so it does not slip.I know the picture shows push-ups and dips on this machine but I would not recommend it for that because when I try to do a push up on it it kind of moves and stretches maybe an inch or so and that's with not much weight going down on it. I would only use it for sit-ups.I am 5'6" and I fit this machine perfectly.I find it better for my neck when I put my hands and hold onto the sides of the mesh.I do not understand why people have left bad feedback about the assembly. You're going to have to be patient, no complaining, the instructions are super super easy to follow. You will just have to be patient and do it.I have added photos of the assembly instructions.Good luck?UPDATE: if you put your shoulders on the mesh part a little bit it is more comfortable on my head and neck. . and if you do it correctly you will only feel the burn in your stomach and it does not hurt any other part of my body. Wow! I will purchase this again. don't listen to the reviews of people complaining they're probably complainers already and looking for a way to get a tight stomach without doing the work.I am doing four sets of 20 reps and by the second set halfway through it is really really burning my abdominal muscles.