Is bon4 any bad?

[The Tube]

Searching on the net, bon4 looked pretty good to me, but seems like some bon4 users on this forum are (or were) not too happy with that. I would like to listen both good and bad reviews, if any of you can explain to me his point of view, I'm so curious!
Thank you

[doc9000]

I tried a Bon4M Small and found it to be quite heavy and, for me, too large. It also wasn't nearly as well finished inside as it was outside. I spent a lot of time polishing the inside with a Dremel before I realized that it was simply too big and heavy for me. Let me know if you are interested; mine is "better than new."