I like Vueling (Vueling), a very good lowcost airlines in Europe.

We flew in May 2019 twice - from Paris to Barcelona and from Barcelona to Majorca and both times we were satisfied.

What you need to know about them?
How to buy tickets for Vueling.
You can through the application Skyscanner or Vueling (or their website).
Their website really slows down, but you need to wait, because the desktop version has many features that are not in the mobile application.

Staff.
The staff is friendly, if at the airport you don't manage to do something yourself, they immediately help.

Luggage.
Here is what is written on their website:

And further:

And finally:

However, they do not find fault if the weight of the luggage is more than 10 kg, I had 14 kg and they did not check.

They have 3 types of tariff - Basic, Optima, Timeflex.
We took two tariffs, as my wife had two baggage - hand luggage and a bag of 20 kg (shopping in paris and barcelona), and I only have hand luggage.

I bought myself a Basic fare (hand baggage 10 kg) + paid extra for choosing a seat (to sit next to my wife), and I took Optima to my wife (hand baggage 10 kg + checked baggage 25 kg + choice of seat).

After payment, the confirmation arrived and the boarding tickets immediately arrived.
They can be printed, but you can also not print, you can simply register through the QR code on the phone, which we did.
The ticket shows how to fold it, everything is very simple and convenient.

Seat selection.

The cost of choosing a seat depends on a number of:
21-25 rows - 4 euros.
16-20 rows - 5 euros.
11-15 rows - 6 euros.
10 row - 14 euros (20% more space here).
Front rows (5-9 rows) - 9 euros.
Space Plus (More space and priority landing - 2, 3, 4 rows) - 17 euros.
Space One (More space (+ 20%) and priority landing - only 1 row 1 st) - 21 euros.
I paid extra for 8-15 places, in terms of saving these are the best places.
The choice of Basic fare + seat extra charge was cheaper than buying Optima tariff.
Therefore, if you do not have large luggage, choose this rate.

The accuracy of the flight.
Both times that we flew this airline, the flights were on time.

Food.
Both times we flew for short distances, so there was no power.

Advice - if you are hungry, buy yourself a meal in advance at the supermarket, as the airports are more expensive.
If you don't care about money, you can eat at the airport or on board Vueling.

Cons of the airline.

1 - the seats do not recline, because of this, that it takes up space, because the airline simply rammed a lot of seats in the cabin.
But! My legs are comfortable (I have a height of 175 cm, but there were people in the salon and they were 180-185 meters tall and they were clearly not uncomfortable).
Since the flights are short - 1-2 hours, this does not cause discomfort, in extreme cases, you can walk through the cabin.

2 - when buying tickets of two different fares, like with us (Basic + Optima), you cannot choose two fares at once, you must first buy a ticket for one fare, because again find the same flight and buy a ticket for it.
And what if there are only a few tickets left on this flight and everyone wants to buy it?
Then one of you will fly (who already bought a ticket), and the other can stay.
Therefore, it is necessary to do all this very quickly, within 1-2 minutes.
It is best to import all of your data and your partner / friend / wife to their website, then the program itself adds it.
Here is such a minus for this application, by the way on their website the same problem.

Summary - if you want to choose a low-cost airline in Europe, choose Vueling.