I've been using the garmin swim for a while now and am quite satisfied.
However, the main error appearing is that often a length is counted as two, especially when I had to stop or slow down in the middle of the pool due to other swimmers. Over 20 laps there is often 1 or 2 additional lap counted.
An easy fix would be being able to merge two adjacent laps into one within garmin connect, automatically adjusting the total distance.
Urs
