123.ie are underwritten by Zurich/Eagle Star. Yes, they are very competitive and possibly the cheapest in the market. Just be aware of what they are covering in your policy. My advise, always get a couple of quotes and barter with 123 when you speak to them. My father had his house insured with a company called Caoga (forget who underwrites them) but when I called 123 and told them his policy was (lets say) 340 Euro, 123 told me they could do it for 320, when I told them the new policy from Caoga was 290, 123 re adjusted that quote and came back with a quote of 250, so, always negotiate.