Went there about 3 years ago shortly after it opened. The cost wasn’t outrageous for a PA28 and in the main everyone was very friendly and helpful.
The only problem we had was getting back airside since without a boarding card or passport (ok we were going from Yorkshire to Lancashire (Blackpool)). Waving the keys and pointing to our aircraft cut no ice and we had to get the Head of Security involved to unblock the impasse. We still had to go through full security (had the most through frisking ever, I think they had just finished their training) and had to hand over a small penknife (I guess in case we hijacked ourselves !) although we provided a sae for it's return.
I would still go back if and when the cloud ever clears from the Pennines but would take both my licence and some form of photographic ID (passport or driving licence) and would just be prepared to accept the same rules as any commercial passenger.