It has enough space and it's very convenient that it opens this way compared to other backpacks. The only negative is that the dimensions are somewhat large and it is mainly intended for travel and not for everyday use, also it might be a bit too big to be considered a backpack by most airlines.

Wonderful backpack that turns into a suitcase, has many storage compartments, and we use it a lot for trips. Very good construction

Quite a large backpack, with a capacity similar to a cabin suitcase. It has a very convenient opening and separate compartments for a laptop. It is of fairly good quality and comes with clothing covers. The dimensions are not suitable for low-cost airlines; it's better to go for something smaller if you want peace of mind. It would be very convenient if it had wheels, because when full, it is quite heavy.

After almost a year of use, the seams opened at the point where the straps are attached to the bottom of the backpack, making it useless.
I use it daily for work, where I carry my laptop, a book, and headphones.
I have also used it on some of my trips.
I bought it with the prospect that it is waterproof, but it is falsely advertised on skroutz. After a 10-minute walk in the rain, everything was soaked.
Although it is a nice backpack with plenty of compartments, its construction quality does not support it. Especially for its price, there are better options.