The first floor is fairly well designed, but the second floor feels much less polished and appears to have been built rather quickly with a large number of simple cube-based objects. Because of that, the model is difficult to use immediately without additional work. That said, it can still be a useful project for beginner or intermediate users who want to practice improving and optimizing an existing model. I personally used it in Unity, and it required several hours of editing, cleanup, and adjustment. Since I have recently been practicing this kind of work, I actually enjoyed the process of gradually bringing the model to life. However, I would not strongly recommend it for someone who needs a presentation-ready asset that can be used immediately. I understand that it was not originally created specifically for Unity, but with more refinement from the seller—especially improving the second floor and reducing the polygon count of sofas and several other objects—it could potentially become a much stronger asset, perhaps even suitable for the Unity Asset Store. Overall, it has value as a base model and as a practice project, but buyers should expect to spend considerable time improving it before professional or real-time use.