Klaviyo: Email Marketing & SMS

So disappointed with this popular app. I've had issues with Klaviyo for over 6 months. I'm on a paid account and always have to beg for any support. The app doesn't work with my theme Fashionopolism and I've had issues with integration, email triggers, and activity logging. It has also dramatically slowed down my website since I've re-integrated for the 4th time because of something not working. It takes days for support to get back and they usually send a copy and paste code with an article link to fix it yourself.