Mazda 3 purchase advice

Hello dear Mazda drivers and fans! I seriously think about buying a new Mazda 3 with 2.0 liter SkyActive engine with 120 hp and 5 doors. I would like to hear your opinions and experiences with this vehicle. The seller describes only the good sides of the vehicle. But I would be interested in much more your experiences with the car. The test drive at the dealer is only in 1 week, but I am very curious. I would like to ask the following questions: 1. How is the car? noise level from the chassis on bad roads? 2. How much rotation does the engine have at 100 km/h, or how fast does it travel in 6th gear at 3000 tours? 3. Does the car have a cooling water temperature indicator? Because I couldn’t find an advertisement on the photos in the catalogue. Is there one in the on-board computer? Thank you for your answers!