As long as you don't expect a long term return on your investment, you may be OK.
At that price, I recommend that you purchase a 3 to 4 year SquareTrade warranty, they cover return shipping if it goes bad & if it's too expensive to repair, your purchase price (minus taxes) is refunded in full. You have up to 29 days after purchase to obtain a warranty & there are online coupon promos that you can apply after the final price is shown. You can also subscribe to SquareTrade to get promos in your email box. You can get 4 years of coverage for less than what the OEM (or Best Buy) will charge for extra. Plus Best Buy warranties aren't the best, they always try to find a fault on the consumer's end & charges for the repair, even though you may think you're covered. Best Buy is the last place I'd purchase a 3rd party warranty from & as far as that goes, the last place in general I've purchase anything from. They sell XPS 8700's with i5 CPU's for more than Costco charges for the same PC with an i7-4790 & 2x more RAM.
So it may be that you can find the same brand of tablet with more power & storage at a lower price elsewhere.
Though I purchase one for every computer I purchase (new or refurbished), I especially recommend one for any Acer/Gateway computer, as everyone that I known that had one either needed warranty service for these, or the units went out not long after the warranty ended. Out of 6 to 8 people who purchased Acer notebooks that I know in recent years (since 2010), none had these for longer than 2 years, every last one gave problems. Most were brought to me to check out, there's many things that I can fix, but not broken motherboards, something that Acer has long been known for.
That's why the low price, I can see skimping on the storage, yet not critical components like the MB.
My recommendation if you're not pressed for time, would be to search for the best models within the price range you're willing to pay. Google can be the best desktop assistant you'll ever need or have, if given a chance. Just don't purchase a brand based on publication (like PC World) reviews, as they 'push' the models there that OEM's spend the most for ads on. That was how I made my first new PC purchase in 2009 & the only thing left I have to show for it is the stand, that was used on a HP monitor to lower it.
Newegg has some good deals, though I'm partial to the site, will still do my homework before a purchase. That's the main thing you need to do, is research the model you're looking at, read the reviews. Visit the OEM forum & see how many users are complaining & what it's about. If there's several with the same issue, that's a red flag. You may be the next to deal with the same issue & some OEM's drags their feet, and what's stopping them? They already have what they want & that's your hard earned cash. They also know the market for $300-450 computers is a large one, many can't afford better & they'll accept a few bad reviews & keep on spewing their junk computers as fast as these can be built.
Whatever you decide, good luck with your purchase!