Solar Panel System Questions

Need a little help here. Looking for feedback from anyone with solar panels.

We got a quote today for leasing and buying solar panels.

For people currently with solar panels, do you have any regrets? Has it helped you save money? Do you have any if the tesla batteries? If so, are they worth it? Does it help your energy bill at all? What do we need to be concerned with or look out for when signing a contract, etc?

Any help from people that have solar panels is GREATLY appreciated.