a bit of hassle, not much
Similarly, I flew to Reus last week, for Barcelona.
The flight was full of young Irish going to Barcelona.
Aer Lingus were 275 for the same dates, Ryanair were 88 euro.
There is a direct bus to the city from Reus airport, I think 18 euro return, takes 1:20 mins.
I took the local bus to Reus railway staion and the train to Barcelona. 2.00+5.85 one way. Yes, a bit more hassle.
Overall, 2.5hrs from the baggage carosel to the centre of Barcelona.