Background
We sell our own shoe and cleaning products across eleven European countries through Amazon. In the highly competitive Amazon marketplace, product reviews significantly influence a potential customer's purchasing decision. Given the vast variety of similar products available, having a high number of positive reviews is critical for success.
Unfortunately, most satisfied customers do not leave reviews, while dissatisfied customers are often quick to share negative experiences. For a long time, we searched for an effective, personal way to engage with our customers and encourage them to share their genuine feedback.
The Problem
Traditional digital methods like emails have a low success rate when it comes to standing out. With inboxes overflowing daily, customers often overlook such messages.
We hypothesized that sending handwritten letters by post would significantly improve engagement. In an increasingly digital world, traditional mail is often forgotten, making it more noticeable when used thoughtfully.
However, manually handwriting hundreds or thousands of letters was not feasible for our team. We needed a reliable, efficient, and cost-effective way to produce handwritten letters and envelopes at scale while complying with Amazon’s strict guidelines:
- No incentives for positive reviews
- No requests for exclusively positive reviews
- Only honest, unbiased feedback solicitation
The Solution: Using the UUNA TEK iAuto Handwriting Machine
After researching various solutions, we discovered the UUNA TEK iAuto Handwriting Machine. It stood out for its value for money, efficiency, and ease of use.
Building a similar system ourselves was an option, but it would have required significant time and technical effort. Choosing the ready-made iAuto with its accompanying software was the most practical decision.
The setup process was straightforward:
- We followed the tutorials and video guides here
- Within about two hours of unboxing, we successfully produced our first handwritten envelope
We started sending handwritten letters to customers in early 2025, and the impact was immediate:
- Positive feedback increased significantly
- Customers were reminded how much we value their opinions
- The repurchase rate improved as the personal letters introduced our company and fostered stronger customer loyalty
Today, our iAuto handwriting machine operates nearly continuously during business hours, generating approximately 2,500 handwritten letters per month.
Pros and Cons of UUNA TEK iAuto
Pros
✔ Cost-effective compared to building a custom solution
✔ Quick setup with helpful tutorials
✔ Noticeable increase in customer feedback and loyalty
✔ Strong impact on product reviews and repurchase rate
✔ Efficient for high-volume handwritten mail
Cons
✖ Wi-Fi Connection Issues
- The machine frequently lost connection despite being near the router
- We resolved this by using a direct USB connection
Tips and Tricks from UUNA TEK: How to Set Up WiFi Connectivity for Your iAuto Automatic Writing Machine (Windows & Mac)
✖ Paper Feed Limitations
- Initial struggles with paper jams, especially with envelopes
- Took two months of testing different paper types to find optimal materials
- Paper capacity remains low (approx. 25 postcards/envelopes)
Tips and Tricks from UUNA TEK: Top 11 Tips to Avoid Paper Jams with iAuto | UUNA TEK
✖ Limited Overnight Use
- Due to the small paper capacity, the machine requires refilling every 30 minutes, making unattended overnight operation impractical
Tips and Tricks from UUNA TEK: iAuto Premium Ultra is just released, which can write up to 2400 letters and 700 envelops at a single time here.
✖ Software Improvements Desired
- A larger selection of ready-made fonts would enhance versatility
Tips and Tricks from UUNA TEK:
The iAuto can only accept single line fonts. Here are 3 different options for you:
1.you can find some gonts created by our team here.
2.Purchase some fonts from other font providers like PremiumUltra and then follow this guide to use those fonts here.
3.Create your own fonts with our free font creator with this guide.
You can find more tutorials about iAuto here: https://uunatek.com/pages/downloads
Conclusion
Despite minor limitations, adopting the UUNA TEK iAuto Handwriting Machine has been a complete success for our business. We achieved our primary goals of increasing genuine customer feedback and strengthening brand loyalty.
There is still room for improvement, especially in terms of:
- Increasing paper capacity for longer unattended operation
- Expanding font options within the software
Nonetheless, we plan to continue using iAuto to personally engage with customers across Europe, confident that this approach gives us a competitive advantage in a crowded marketplace.
This case study is contributed by @Edgar