Yes, the evening was a great success! I got a lot of compliments for my cooking, we all saved a lot of money and I got some drinks for free as an additional thank you for the cooking :D And yes, sitting together in the company's kitchen was much better than in a crowded restaurant, we even had our own music.
To compare: the food as 2€ per person instead of at least 10-15€, the pre-event drinks were also 2€ per person, the same amount would have cost about 10€ elsewhere, more if you wanted the same quality!
But then I spend quite some money in the irish pub where we ended the evening, but that's OK - all in all I spent half as much as the recent years and it was even better!