I think as long as it doesn't take the thread cartridges and you can use regular spools and it has a usb for taking designs from your computer to the machine it should be fine. Walmart has a generous return policy ;)
I got bored with a 5x7 hoop quickly and had to have the next one up... I haven't used that big hoop yet! lol. Who knew?! Don't tell hubby since I bought and sold and sold and bought to get the one I have now lol but I wouldn't trade it for the anything (4500d)
If you are only going to do labels and monograms, the 4x4 hoop will be fine but if you want to do anything else - lace, tshirts, potholders, aprons, etc, that 4x4 design will look reallllly dinky on anything bigger than a baby bib....