Don't be put off it, everyone is different. I would say try and see, there are others on here who get on well with it.
But for me the lack of sleep was awful and as I have a 50 min car drive in the morning I felt it was unsafe to continue. Maybe it might have become more tolerable but working and with school age children to look after it wasn't an option.
Lots of people complain about the Mirena but it suits me better....we are all so different.