If you're on the big & tall side like myself, you're probabaly hesitant to purchase this, especially since Halloween costumes historically run small. (I know I was!) however let me assure you that it does fit me just fine, and I even had some room to spare.
That being said, The legs and arms have an elastic on them to keep the air in. This can be rather tight depending on how large your ankles/wrists are.
Getting into the costume wasn't too bad at all; I was expecting much worse due to reading the other reviews. If I can do it being 6'2, I'm not sure what others were doing wrong. Here's what I did to get it on quickly and easily:
-Lay costume on floor, zipper facing up
-Insert legs into each leg opening
-Crouch into a ball (hugging your knees)
-CAREFULLY bring the costume up over your head
-Once fully inside, ensure fan is on, and zip up
-Finally, put hands through arm holes
(Same process in reverse to take it off)
Lastly, I will confirm what others have stated. It gets hot inside. Very hot. I only wore the costume for 5 minutes to test, and I was already sweating. Hopefully this won't be an issue since it will be colder in October.
The costume seems to be well made, and all parts were included.
Please excuse the poor picture - due to the Trex having short arms, they are inherently bad at taking selfies.
If this was helpful, give a thumbs up. :)