Of all of the OVO lineup, this one is the easiest to set up and has the fewest parts to contend with.
The main pod is the same as the OVO Studio, The OVO Dwarf Hamster Habitat etc... same 132.73 square inches of roaming area the parts are completely interchangeable.
The wheel is on the outside of the main pod, so this opens up the space for other interesting pet toys.
The outside wheel is just over 7 and 1/2 inches in diameter, so plenty big, with a white piece to catch any bits and litter that might fall through the wheel openings.
Assembly is easy and plans are well illustrated.
The base is transparent, so your pet may feel a bit "exposed" and you will definitely want to get something that provides a dark hiding space for your pet to feel secure.
This fine for Hamster, Gerbil, or Mouse, but should in my opinion, be attached to other Habitrail Habitats such as the Cristal, or if you want to go BIG, get the Habitrail Loft. Of all the habitats we currently own, the Habitrail Cristal seems to be a favorite location for using the exercise wheel and the drip, ball bearing style, drinker seems to be the most used by dwarf hamsters.
For sleeping quarters, the upper pods of the Habitrail Dwarf Hamster Habitat is a favorite, and the second most used sleeping area is the lower level (under the cardboard maze) of the Habitrail Loft.
The Hamsters have not used this exterior exercise wheel yet, but it's only been in use for 48 hours. Everything functions smoothly and the cage locks securely with a very good view of the interior from every direction.
This also comes in Pink, and other than the color, it's identical.
If you already like the other Habitrail OVO Units, you'll be equally pleased with this one and I could find no significant drawbacks.
While I'm writing this review, one of the Robo Dwarf Hamsters is finally in the exterior exercise wheel, so that's a thumbs UP from her.
Do I recommend it? Yes indeed, again, as a component of a larger system, not a stand-alone habitat. Habitrail hit it out of the park with the OVO lineup.