Yes, and heres my story...
I had my 20 gal split in 3s and yes it did work out well, but when one of my guys died i moved my female in there and she is a jumper for sure! I had to lower the water so she couldn't make it over the dividers, luckly the guys didn't mind having her visit though.
She would get over through the front area of the tank where the top opens for feeding and such, its the only part where the divider doesn't touch the top, and when i saw her doing it is when i lowered the water and then she wasn't able to jump that high.
Only thing was it bothered me to see the water line go beneath the trim, but thats just my own silliness.