Be aware that this is not a direct boat to Lembongan, you’ll get off at Nusa Penida and get a short ride in the back of a pick up and a speed boat across to Lembongan. Organisation of this was decent though. Wear flip flops because you’ll need to wade to the boat.
Did it get us from A to B on time for a good price? Yes.
Was it comfortable? No.
All the 1 star reviews are people who clearly expected some luxury travel package for £11 per person in SE Asia.