I found the idea fascinating, but it was too clunky and heavy for the features it offered. I think the concept was too far ahead of its time, it couldn’t be implemented well in available tech.
For that matter, the Palm Pilot was beloved of a lot of techies at the time but neither the input nor synchronization technology/infrastructure were really there. I won one at a trade show and even upgraded it later but, honestly, it wasn't all that useful.