UpCharge Fees Addons Surcharge

We use UpCharge to help pass along the credit card fees that we are charged. At one point I needed product support and their team was quick to respond and resolve the issue. I received a response and answer within minutes of emailing them.

Not recommended this app. The app cannot fulfill what I need and customer service representative agreed about that. After that, I uninstalled it and still charged me 9.99 even within 14 days free trail. I don't know why!!!

Downloaded and added this app after having issues with another app not loading. Did have a singular issue that was resolved within a few hours and no longer have the issues. I am using this app to add fees for handling and service fees to pass onto the customer. It's been a breeze to use. I do recommend this app for anyone needing this service.

The Mageworx team have been amazing helping us migrate to the new verision of their app, Never have any problems with the app, works like a dream
Shoutout to Maggie and Polina who have outstandingly helpful
Recommend this app.

Installed this app needing a solution for new tariff taxes/surcharges that now apply in varying amounts to select products (not all) we sell.
The UI for this app is good and setup was straightforward. It would allow me to setup different % based or $ amount surcharges based on a variety of conditions, which suits our needs well. Basic setup was easy.
There was some delay (minutes) before the first fee I created started showing up, but that was ok and once it showed up further changes worked instantaneously.
Our % based fee for a specific product looked good on the Checkout page - the app adds a product, which is bundled with the applicable sale item and gives a clear picture of what the fee is for and amount in both %s and $s.
Very dissatisified with presentation on the Cart page. We are using Pursuit theme and it added multiple CartItem__Property rows to the product listing in the cart, which would be fine except they contained div and parameter names (code) and were not user friendly. I was unable to find a solution for this on my own and could not wait for dev team to respond.
There are some advanced setup options with no info or help available in the UI or app documentation, and I suspect it was these options that were causing our problems. I tried adding various divs to the fields but seemed to have no effect. While we wanted to use the required hidden fee option, I was not able to get any options to work (radio button, checkbox, drop down, etc.). Perhaps it was a compatibility issue with our theme (pursuit).
The app is pretty invasive by adding exclusion conditions to numerous (but not all?) Product Collections in our store, which were NOT removed when I uninstalled and had to be removed manually.

Update: The team responded very thoroughly and responded to the issues I experienced.
Private line item properties are used to store and display detailed information about the surcharges during checking, which are supposed to be hidden from customer-facing views according to Shopify guidelines. So the fact that they are being displayed is an issue with the Pursuit theme we are using. A small code snippet can resolve this.
The conditions that were displaying in the collections were a legacy feature that is no longer needed and was removed so future users won't have this issue.