I switched to Synchrony about two years ago. It took a few days (maybe two weeks total) to get everything opened and funded, due to having to mail in forms. Since then, everything has worked smoothly, transfers in and out are easy online. The website is easy to use.
Opening CD can be done online, but they require signatures on forms to be sent in. Closing CD requires a phone call, but it was quick and customer service didn't try to sell me anything else. No weird hidden charges. I'm pleased with them overall.
I have a CD ladder and savings account there. I don't use their atm card. I have the Synchrony account linked to my Wells Fargo checking account for easy funds transfer in or out. (I keep the Wells account for convenience of atm machines, it's free to me.)