Sort of Skegness with pine trees.
That's more or less how I'd describe most of the coastal resorts, only without decent pubs and without arcades filled with dodgy geezers.
I've been once to Darłowo and it was a total waste of time. Overcrowded, smelly and with nothing redeeming about it whatsover. Fortunately, I was paid to be there and do almost nothing for 2 weeks, so it wasn't so bad ;)
Inland is definitely far better, especially if you venture off the beaten path. I had a nice few days up near Wildrover's old neck of the woods not that long ago, and it was fantastic - empty, peaceful and quiet.