I got this hutch for my guinea pig. The instructions were lacking, which is why I gave it 4 stars instead of 5. I had to have my stepdad put it together because of the confusion the lack of instructions caused. 

Pros:
It is HUGE! I love that it's so big. We're modifying it to be able to be partitioned in half for another guinea pig, so my pig can have a friend :) 

It's easy to customize - if you're handy (or know someone who is), it's really easy to work with and figure out how to customize it and add details to suit your needs and preferences.

I chose this for my guinea pig because it'll keep him safe from our cats, as well as give him a lot of space to run around.

Cons:
Like I said, the instructions were not very clear, so that was confusing.

The wood is kind of fragile in some places - it's Chinese pine wood and it's split in a few places already with some light handling. If you're going to use it outdoors, I'd suggest weatherproofing it, maybe. 

It's an overall good hutch.