I have Graywind dual-shade blinds throughout my condo. I am super pleased with the functionality, the quality of the product, and the pre- and post-purchase support from the Graywind sales team. Buying window treatments like this is a big investment and you want to get it right. The Graywind team know this and are extremely helpful in making sure you get the right fabrics, measure correctly, understand the installation, etc.
Two recommendations before you start: Buy the fabric sample books and start with one window to get things right before you order for the whole house.
Graywind offers a nice array of fabrics. I chose a see-through (5% black) fabric closest to the window and an opaque fabric for the shade closest to the room. They both offer privacy; one dims my bright western exposure while the other blocks all light. Both fabrics are of excellent quality. There's a lot to get right - the winding on the reel has to be exact, the weight at the bottom has to be right, etc. These were perfectly executed on all my blinds.
Physical installation was quite easy for me. I chose an inside mount, and the brackets were easy to install with a couple of screws. I drilled an extra hole in each bracket so I could screw it into the side of the frame (in addition to the top) and this provides better alignment and more security, I think. Once the brackets are in, mounting the blinds was a snap.
Once you've installed the blinds, you have a programming task ahead. Don't be intimidated; you can get used to it and once you do, your remote will work perfectly. I chose to have odd numbered channels on the remote for the inside (sheer) blinds, and even numbers for the opaque blinds. Here are the steps:
1. perform a hard reset of the motor
2. select the channel you want to use on the remote
3. pair the remote with the motor
4. check the direction (up button moves the blind up); reverse if necessary
5. set the top limit
6. set the bottom limit
Each of these steps is outlined in the manual, albeit not in that order. Repeat for each blind (motor) and presto, you're in business.
Next, I used the zigbee motor so I could connect with my home automation. I used a generic zigbee/wifi hub with the Tuya chipset (Tuya makes the chips in many home automation products). Tuya devices use the smartlife app - I followed the instructions in the Graywind manual for pairing with my hub. Alexa has a smartlife skill, so once the blinds were paired with my hub, I could control them with Alexa. One small gripe that is common to most blind integrations is that the nomenclature takes some getting used to. For example, you can say "Alexa, bedroom shade 50" to set the shade to 50% open. In this context, "100" means all the way down, as does "on". "0" means all the way up, as does "off". So instead of saying "open the blinds", you have to say "turn off the blinds". From what I've read, people have the same issue with the built-in zigbee hub in the Echo. But nomenclature aside, it's pretty awesome to set your blinds by voice control or on a schedule (using a routine).
I can't say enough good things about these blinds. They're attractive, rock solid, and give your home a real "Jetsons" feel when they set themselves up for optimal viewing of the sunset or waking up in the morning. Graywind has produced a unique, high-quality product and their support has been stellar.