I'm on my second coil, the first I had in 2007, had no problems what so ever, no weight gain, no periods, everything fine, had it out in 2009 as wanted ttc! The 2nd one I had put in when LO was about 12 weeks old and I've completely lost my sex drive, always feel bloated and fat but I think that's due to baby weight I haven't lost, I tried getting it removed about 2 months ago and they couldn't so been referred to hospital and I've had none stop bleeding since they tried to remove it, I think it all depends on the person, it could be ok for you like it was for me the 1st time round!