Luckily I was able to check-in online, however had to wait in line to check my bag in. Between 2 we only had a 15kg limit (That was total, not each).
Bag check-in was horrendously slow. Flight was delayed by an hour and then to add insult to injury, boarding was also slow.
Seats were incredibly uncomfortable and they couldn't seem to get the lighting or heating right. By the time we landed we felt as though we'd been in the air 3 times as long as we had.
Yes, they're cheap, but cheap for a reason so please remember that. Anything more than a couple of hours of flying, I would highly suggest using another airline. And, to be honest, by the time you add the little extras, it isn't that much cheaper than better airlines offering seats and baggage as standard.
Anyway, entirely up to you and what your budget allows.