Klaviyo: Email Marketing & SMS

SOLD - I needed to send emails to a group of customers who bought a specific product due to an issue and this app made it possible and simple to do. I tried a competing service before Klaviyo because the reviews made me nervous but gave it a shot because the other one didn't have the functionalities I was looking for. But the features sold me and any questions I've had so far they've answered promptly...so two thumbs up!