I tend to write all of my hubs in Microsoft word before I write anything on the site. As for a buggy interface, I have not noticed anything bad yet. The interface offers a lot more then other writing sites, which is why I love writing here a lot more than other sites. I tried Triond.com and Helium, but Triond, although the payout is only $0.50, I was not seeing a large amount of views or money per month. Helium was not a great site either because the content was not considered yours after you submitted work, along with this, you did not earn much with their payment program.
Hubpages has been amazing so far, and their customer support is very helpful. I also love how the hubscores work. It helps me figure out which hubs I need to improve and which ones are doing well or will do well in the future.