We started using Biz Modules products in 2006. We have purchased multiple products and licenses throughout the years and have never been disappointed. We use UMG almost exclusively with all our new web site customers. Biz Modules continues to improve their products and their support is excellent. I would say UMG is one of the best DNN products available.
I purchased the "Feeback It" module thinking it was a standard DNN module; however, I was not able to add multiple instances of the module on a single page. I also could not get any support. After contacting support via email several times and only receiving an automated response, I'm asking for my money back.
I've been a user of DNN since 2004 and IndooGrid is by far the best module I've used. Very powerful and feature rich. A must for anyone who is serious about creating custom web applications.
Some months back, we bought this module for a client running a single dnn installation. We liked it so much that we decided to purchase another license for all our hosted clients. Great module.