I have a Tenecor 330 with the Simplicity Plus package and I hate it. It is very difficult to clean and maintain due to its narrow opening and the placement of the top braces. I don't have big arms but I still end up scraping them raw every time I need to pull out the pumps or reach the lower parts of the filtration area. I have had to modify the drip plate to get the water to go through at a reasonable rate.
I strongly recommend you get a tank drilled for a sump instead. You will have more flexibility, better access (if the sump is well-designed), more useable space in the display and greater overall water volume, etc. etc.