Tråkk Inn review for Amai PreOrder Manager + Notify

Unresponsive and some generic "all works for us" " is it network problems" type response when contacting support. Have to regression test all functions in shopify it seems as it not really clear what this app left behind.... When signing out of the app after uninstall I got a "sorry to leave you mail. Even the link in the email does not work.... and the email states: "we are working hard to improve our app".... text from the supplier "P/S: If you had uninstalled the Pre-Order Manager app directly from the Shopify Admin panel without following this guide, please contact us (by replying to this email) to have the codes removed." If you love problems, regression testing, sloppy functions, unresponsiveness, generic customer service answers and as a bonues an uninstall that requires code change this is for sure the app for you. ..... If someone could give a good alternative to this App where you can control pre order on collection level it would be great to have some experiences shared.