Hopefully, a useful app, but installation was a letdown / cumbersome process on 4 fronts
1) Sometimes, the explanations weren't clear, e.g., the benefits (or not) or adding text on buttons. If the field says "Please Refresh" - why isn't this pre-inserted, anyway? "'Cancel Column Cannot Cancel Text' - The text shown for the cancel column, if the order cannot be cancelled" <--- what to put here? Leave blank (to a default)
2) Where fields or items are located on the page, there is only a screen shot of what you need to click, as opposed to where it sits on the page - e.g. 'add block' appears in the 'Sections' section of the page, as opposed to the default 'Theme Settings' where the page lands
3) In part, our fault for missing this first time round, but although support FAQ mentions it hidden away, "Q. Do I need to have customer account enabled to use Cancellable app? You do not need to have customer accounts enabled to use Cancellable. If you don't have customer accounts enabled, you can skip the customer account page installation step." -- it's not until midway through the installation, it asks to you to login to an account where orders have already been placed. We have not yet launched, so we did not have an account we can login to where orders already exist. Having then created an account, WITH password, just for this purpose, and placed an order, complete with credit card info.
This could at least be a more obvious warning BEFORE purchasing ("Please note, you need to have active customer accounts to complete full installation of this App).
4) It seems you cannot select an alternative email address to which to have Cancel notifications sent - it defaults to the store-registered one. Unless we've missed this - please advise...
The Customer Account requirement was an annoyance. Took me 30+min instead of what I thought would be 5 minutes at tops.
Otherwise it seems really straightforward, and hopefully not needed...
UPDATE: Post initial 3-star review - they immediately reached out to acknowledge where they could do better, and offered to change my registered e-mail address Appreciative of the good customer service.
The App does what it says.