I haven't actually been to Unity Temple for their church services, but I have been there many times for their events and on guided tours. As you may know, Unity Temple is a Frank Lloyd Wright building, so it is on the walking tour of Oak Park. It is a great building to look at and enjoy, both inside and out. The congregation at this church often have events that the general public are welcome to attend. I have been to many pot luck suppers, open houses, socials, etc. and everyone seems genuinely nice. It's a great place all around.