There was a cage question I replied to about a month ago, I will just copy and paste what I wrote of my experience :)

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I upgraded to the Midwest Deluxe Critter Nation Two Story https://smile.amazon.com/gp/product/B001NJ0DAY/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

I like the horizontal bars, its size, the flat floor, large doors, and that you can expand it. I can only recommend it if you are willing to work on it, as it can be hard to put together and dangerous otherwise.

If the pieces were perfect, it would not be hard to put together. But some of the connections were bent and needed to be straitened, had a bad weld that made a gap, so had to be creative and a second set of hands to get it into place. It is just a one time headache and your set might be better.

For sugar gliders, you will want to not add the middle floor section, not adding it exposes holes, and then there is holes for where you can add the adjustable shelves.

The dangerous part is the holes have sharp edges, so they need to be filed smooth. Also, the punched out bit is still in the holes on most of them. They can be removed with needle nose pliers. If this is not done, I would worry about a curious sugar glider loosing a finger or whole hand...

The one I had before was the HQ Flight Cage https://smile.amazon.com/gp/product/B002UTZ040/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

It is a little smaller, but still a descent size, it has bars on the bottom and slide out floor under it, so with a bit of newspaper (or what ever you prefer) it was easy to clean it, the smaller doors can be an advantage if you have have trouble keeping the gliders inside when you open it.

I had it for three years, the main reason I replaced it is I did not like the vertical bars, even though I never had an issue, I worried about it hurting their feet, as they always slid down on the bars a bit and with the bars on the bottom, they did not have much flat ground to stand on. I also wanting something a bit larger.

Other wise, it was a great cage. It was easy to put together and the only adjustment I had to make was to zip tie shut the little bird doors on the top of it.

I looked into both cages, before getting them, to make sure they were not coated with anything toxic to sugar gliders, which is the main issue with cheap bird cages.