I have the JBJ and its a nice tank. My mom bought the 29 gallon model and had it crack where they bent the glass on the corner out of no where. This is not an uncommon problem. They were good about replacing it though.
The plus side is they do look really nice and have an "almost" all inclusive package going on. They hide equipment in the back which is a bonus over piecing it together from a regular tank.
The down side is they are not real flexible about upgrades. If you want to swap out pumps or lights or any of that depending on fish or corals and all that it can be a pain. They offer a higher watt MH
hood if you decide to start keeping more high light corals but it costs almost as much as the whole tank package did to begin with and i have heard they have problems with heat.
Long and short. I'm happy with the tank and would recomend it for a begginer with limited space. If you plan on getting into the reef/coral side of things i would suggest putting the parts together your self so you have more options for lights and flow if you chose to change things up down the road.
Edit: just saw that you were already planning on getting the MH
model. I would strongly recommend you look around for other options in that case. The price they ask for that is insane. You can get the viper clip on MH
pendants or part together your own MH
set up for considerably cheaper.