Update: 8 months after purchase and the machine broke. I found a Gaggia guide on YouTube to do a diagnose test and discovered that the boiler is not working, in other words, the water is no longer heating. So suddenly, during a descaling process, the boiler burned out. It's really ridiculous for something you paid a lot of money for to break in just 8 months. I hope I don't have any issues with the warranty now, I will come back soon once I figure it out.
NOTE: For those who have purchased this model instead of the Deluxe, know that the option of double espresso dose by pressing the single dose button works here as well. It is not shown in the instructions and I found it randomly from a video on YouTube (in the video, they press the single dose once, and as soon as the grinder starts working, they press the button again and the double dose lights up, I tried it on the Naviglio and it worked).
After 5-6 months of use, making 2-3 double shots of coffee every day, I came to share my conclusions.
First, I will say that it makes pretty good coffee with minimal burnt taste, which is a plus. Personally, I bought the machine for espresso shots, so I am quite satisfied and I don't care about the burnt taste.
For double espresso shots, I don't press the double dose button, but essentially press the single dose button twice because the double dose button just releases more water with the coffee.
Also, with a water filter, the coffee has a more intense and clean taste, so consider putting the filter in the water tank. I didn't get it at first, but I'm thinking of getting it now or finding a similar solution to purchase.
Now let's talk about the negatives.
1. I believe the grinder wastes a large amount of coffee for 2 coffee doses, so if you think about saving money, there isn't a huge difference compared to capsules. There is, but you will wonder if the purchase of such an expensive device was worth it (I found online that it uses from 7g to 10.5g per dose, look it up).
2. Small difference in quality/taste compared to regular Nespresso capsules. I use the same brand of coffee in both capsules and whole beans, and the differences are small.
3. Annoying cleaning and maintenance (oiling). Even though you do it occasionally (every month or every 3 months), it is still time-consuming and can be a hassle for those who are not familiar with manual tasks.
4. This specific model does not accept ground coffee, and as a true coffee lover, one day I made a mistake in an order and ended up with ground coffee that I don't know where to put (you can argue that this is not a negative, it's just how the model is).
Now let's move on to the positives.
1. User-friendly. You wake up, press the ON button, and by the time you prepare your breakfast, the machine is already heated up. You press the single dose button twice for a double espresso, go back and forth, and it's already done.
2. Money-saving compared to takeaways or even capsules at home.
3. Quality construction that shows it will stay with us for a long time (hopefully)