The installers are excellent, there are no complaints at all, but the company itself is terrible. You can immediately forget about the deadlines and the fact that someone will call you and warn you at least. I have to constantly call myself and ask "when?", and in response the standard "Heavy load", "the car broke down", "the cat is giving birth". In general, it's not professional at all.
Prices are the same as everywhere else, but other companies offer all sorts of bonuses in the form of free grids on windows or something else.
Conclusion: if you want to install windows, it is better to choose another company.