IMHO, Jambo pits don't sell like they do because they're a popular trend. They also don't sell because their website is fancy either. They just cook consistently and are a solid smoker.
I'm not going to speak to the comparison to other cookers as I've not cooked on the "clones" out there, but I'll just say that, personally, I've not cooked on a better stick burner than a Jambo.
If you choose to go with a Jambo, you will not be disappointed.
I've not met one single Jambo cook that regrets their purchase, unless it's that they wish they'd upgraded.