Amp Back in Stock | PreOrder

I chose Back in Stock from my friend's recommendation and I am SO happy I did. The process was so easy I feel like I clicked 3 buttons and it was integrated! Then, I couldn't figure out how to make sure the "Notify Me" button would show up even if only one size was OOS, so I emailed the team and they fixed it and replied within 5 minutes. So happy I went with this app over the others.