Lots of people on here have insurance with different companies - just be careful that the important things to you are covered.
I have mine with E and L which was only because at the time, they were doing a deal in that I got one of their packages half price. I would ensure that the attire is covered - and not just a week before the wedding and that things that are costing the most are covered too as well as cancellation. To be honest, when I was looking, most of them seemed pretty much the same. Just make sure you check the terms and conditions carefully.