Tech giant Samsung unveiled the Galaxy Tab S this summer. The Post's Hayley Tsukayama breaks down the new tablet's features, drawbacks and competition. (Jonathan Elker/The Washington Post)

Samsung's new tablet, the Galaxy Tab S, takes direct aim at Apple's iPad line with 10.5-inch and 8.4-inch screens at a time when more consumers are questioning whether they need to buy a new tablet.

The popularity of the big-screened phones, including Samsung's Galaxy Note line, has slowed the growth of overall tablet sales. Analysts at IDC slashed their growth projection for the tablet market in 2014 to 19.4 percent from 23 percent. Meanwhile, the market for high-power, highly portable devices is about to get even tighter, according to a Monday Gartner report that says the  PC market is set to grow this year, thanks in part to super-portable computers such as the MacBook Air, Dell Ultrabooks or the Microsoft Surface.

That leaves the Galaxy Tab S in a tricky spot. Which is too bad, because in many ways this tablet is the best in its class. There are few flaws in the design of the Galaxy Tab S, which sports the same dimpled polycarbonate back as the Galaxy S5. (Samsung provided a review unit to The Post.) The most striking part of the tablet is its screen, which delivers the crisp, almost over-saturated images we've come to associate with Samsung screens, which makes video watching on the tablet a wonderful experience. Plus, the bright screen doesn't drain the tablet's battery. I managed to get about two days of normal use out of the tablet, which is about on par with similar iPad use.

In many ways, Samsung's smaller tablet actually outshone its iPad counterpart. Its lean, thin body is proportioned like a smartphone, which makes it easy for those who have Samsung smartphones too; it also has proportions that are a little more palm-friendly than the iPad mini. And it sports a fingerprint scanner that  you can use to unlock the device and authenticate purchases made over PayPal. You can't remove the battery — that thinness is a tradeoff for something! — but the tablet does have a microSD card slot, so you don't have to worry about overflowing the memory.

While the hardware is pretty good, the Galaxy Tab S could use a little work on the software front.

Yes, there are some standout features. For example, the Galaxy Tab S devices are compatible with Samsung Knox —Samsung's security software that lets users separate their work data from their personal data — which should be a great selling point with business, and perhaps government, offices that are looking for devices that employees can tote with them. Users can also run multiple apps at once, offering  multitasking options that Apple simply doesn't have.

But for all the power in the tablet, the software still hiccuped when running multiple apps — something that's a bit disappointing given that it packs a very high-powered processor. (An Exynos 5 Octa chip, for those who want to know.) Part of this may be because of Samsung's animation-heavy proprietary apps that come with the tablet, such as its Milk streaming music app and Papergarden magazine reader. Still, the software problems aren't enough to outweigh the overall quality of the tablets.

In fact, in many ways, these are the tablets that we've been waiting for from Samsung. The problem for the company, however, is that it may not be enough for it to win the tablet market. Samsung is steadily grabbing a larger portion of the world's consumer electronics market, it's seeing the most success with lower-end phones and tablets that simply don't make as much money, and analysts predict that the company will report its fourth-straight quarter of sliding profits this week.

These high-end tablets do have the chops to put some pressure on iPads, and trump the Android landscape, but they may be not drool-worthy enough to produce much-needed mega-sales for Samsung.