After using the original surf unit for the last ten years or so, the lack of an electrode cable when recovering a board in the impact zone was a revelation. No shocks, no tangles. The joy factor definitely lifted.
On one session I found that the power module was intermittent, and then stopped working. I put that down to a poor connection, so thereafter washed the terminals with fresh water whenever removing for charging, and was careful to ensure the power module was pushed home with screws just tight enough. I’ve had 8-10 sessions since with no problems.