Well, first of all, great job paying attention to your parrot to see what they might like. there's no guarantee your bird will like a sleeping tent. My gcc also loves crawling under the blanket and going to sleep and so i just end up laying there and playing around on my phone until he wakes up.
I know a lot of people will completely advise against one. Personally, I went through reviews of tons of different ones and flipped through a great number of forums until I decided on buying one of these
http://www.amazon.com/Pollys-Love-Nest- ... B00061UUXAWhich I felt was the safest option. I highly advise against getting the furry ones, I saw a lot of posts about how the birds ingested the material and the owners didn't realize until it was too late.
Even then, I checked regularly for loose threads and the like as your bird can get caught on them and become injured and/or die.
In the end, he only used it maybe about ten times, and then stopped. It served as his "toy box" until it was time to rotate it out in exchange for a different toy.
In the end, it's your decision to make. I wish I'd spent that money on toys instead, personally.