Pros: PRICE...if you don't need carry-ons.
That's about it.
Cons: CABIN LUGGAGE. No free carry-ons. I understand that this is a budget airline, but I didn't like (1) paying for standard cabin luggage and (2) having to dig around the site to locate the relevant information for our particular situation. The policy differs based on type of ticket (cost tiers) and start/end points. It took a while to figure out when doing my research on prospective airlines.
COMFORT. The seats were uncomfortable.
NO PERKS. You have to pay for everything, including checking in at the airport, choosing a seat, and any drinks/snacks on the flight.