Long exposures -> Perfect
Group photos -> very good, not a race with Timer
Robust? -> Beach, trekking, parties, rain, etc ... A 1 supernatants
Reception -> Much more than you can use it on the beach, I mean good 100meter
Baterievebrauch -> Good 1,000 photos, 25% long-term exposures with the remote control made my first are still in use
Handling -> Very easy, jack plug in the camera, receiver switch off you go (make transmitter / receiver on the same channel The first time, also very easy)
Highly recommended !!!