I could. The reviews show that it doesn't always provide enough power (depending on the device). Anyway, it's one more thing to have to buy.
It just makes the iMac a not all in one computer. First add a modem for when you must send some over the phone line faxes. Then add an external DVD drive for those times that only a drive can handle what you want & need to do. Then add an external FW800 port adapter as like many here we have 10 or more FW800 drives & no, :0" YSB 2 drives, let alone an USB3 model. We now have an all in four computer. This makes the new iMac look pretty junky.