Fist Gloves?

I have been working on my freestyle/crawl stroke and it appears that vertical forearm drills are really helping me increase my dps. After doing a little research I have come across a product called fistgloves that seem to really force you to use your forearms. The gloves force you to ball your hands up into a fist and as a result do not allow you to use your palm/fingers while swimming. Today I decided to try swimming some laps while balling up my fists WITHOUT the fist gloves. It seemed to work pretty well. My stroke count went up, I started to get a little case of dropped elbow on my left arm but started to do a better job using my forearms during my stroke. So...my question is whether there is really any benefit to actually buying a pair of fist gloves or can I pretty much get the same result by simply balling up my fists? I have no problem spending the $10 or whatever they cost if there is any real benefit to purchasing this product.