Oh I saw this late. I went to the 2nd DGTL night in BCN last year. It was my first proper festival in a while (done Veld in Toronto 2017, original EDC in Los Angeles).
I got there really late, I was really enjoying just chilling in Barcelona Tbh as this festival was after my 2.5 week trip in Ibiza LOL. I was taken back by the number of ppl but the sound was good in all the areas. They didn't have the timetables posted anywhere clearly, so you had to use the app. I was charging phone at a phone charging station so had to ask randoms. My phone charged pretty damn quickly btw.
I did enjoy it, friendly ppl there. One of the bars did purposely charge me double for a drink which was BS but I caught it before I paid. They only took card too I think and my Canadian cash card actually worked.
There was barely a search going in. It was hard getting back tho as all the taxis got mobbed. Overall good festival, but the DJs were the same as what you can find in Ibiza really