I have the FL8-SE. I like it.
The newer ones have some built in features above and beyond the FL8-SE. For example when fishing in real shallow water, you need to add on what they call an "S" cable to the FL8-SE. That "S" acts as power reducer that is needed to get a clear picture. Even when the gain is down all the way, the unit will produce too much power and the picture will cluttered. With the newer versions, that "S" cable is built into the unit so that you don't have to purchase one.
I don't have any issuses with mine. It suits me well. I don't use a flasher in shallow water. I target rainbows. When you're in 2-10 F.O.W, you don't really need a flasher.