You pay a 1 off membership fee and then buy swim credits and book swim slots on the Fit by Wix app. The location is convenient for access from the Lincoln bypass and A46. Lots of parking. A changing room and toilets on site. You can rent wetsuits etc. The water is clean with no run off. Next to the bypass so there is traffic noise but you soon forget about that. Buoys mark a 200 or full circuit 800m loops. Lifeguards at both ends. Great cafe with hot drinks and lovely food. Good atmosphere.