I bought this remote for my D3100 after reading the reviews and knew what to expect. So when it didn't initially work i re-read the reviews, and hey presto up and running in no time. I would agree that mounting on the hot shoe is a problem as the flash more often than not tries to pop up and the receiver must be removed before the flash can be reset, however leaving 'dangling' is not a problem. The lead also needs to be fully inserted into the camera...double check this, as the remote will not work until this has been done. An apparent problem with focusing was overcome when i discovered that the camera had been left on manual focus, so all in all user error all round. Set up instructions would be useful but with the amount of info available on line it's certainly not a deal breaker. Great value!