I'm happy with the Mojave from Red Baron Aviation.
It's similar to designs that many build for themselves (small aquarium pump, food container, etc.), but at only $150 shipped, I'd rather spend my time on other things. Shown in this VAF thread:
https://vansairforce.net/threads/red-baron-aviation-product-introduction-to-vaf.225086/
If by "service" you mean the very occasional refreshing of the desiccant beads, then yes. I'm sure DryBot is a superior product that doesn't look like a kid's science experiment, but I'm happy to do this little bit of service to save $1,000 on the purchase price.Unfortunately they require some service. Cannot plug in and walk away. I required that ability si went with the DryBot.
If by "service" you mean the very occasional refreshing of the desiccant beads, then yes. I'm sure DryBot is a superior product that doesn't look like a kid's science experiment, but I'm happy to do this little bit of service to save $1,000 on the purchase price.