Thank you for reaching out to the Community about your experience! Where exactly are you experiencing this slowness (logging in, editing a campaign, etc.)? We have seen cases where some users have 3rd party add-ons running in their browser that could affect how Constant Contact works. A troubleshooting step we always suggest is testing your account in a different browser or even a private/incognito window. Are you still seeing this slowness when trying in a different browser?