Solar Panels - are they worth it?

So, I have just decided to get solar panels on the house, as it seemed like a reasonable decision after talking to the sales rep. So here I am looking forward to getting the panels on, but little did I realise that mentioning my plan in conversation would be such a divisive topic! So many opinions. Now I'm wondering if I made the right decision.
So I ask, solar panels, are they worth installing now?