We learned at CES 2015 that Dish planned to disrupt the paid TV market (read: cable and satellite) in the United States, and in February Sling TV officially launched. Gizmag has been trying out the service for over two months now, during which time Sling has aggressively expanded its channel offerings, but has failed to clean up its sloppy software.

For more details, check out our initial Sling TV review, but the basic idea is that Sling is an "over-the-top" subscription streaming service that offers 21 live channels and some on-demand content. It costs US$20 a month, doesn't require any other sort of cable or satellite account, and can be accessed across the major platforms via apps for Mac, PC, iOS, Android, Amazon Fire TV and stick, Roku, Xbox One and certain smart TVs.

Sling launched with some big-name networks including CNN, ESPN, Disney, TNT and the ability to add extra sports, news and kids' channels through add-on packages for $5 per package. Dish and Sling continued to sweeten the deal shortly after launch and our initial review, adding AMC (home of mega-hits like The Walking Dead, Breaking Bad, and Mad Men), IFC and a Hollywood add-on package including Epix and SundanceTV that provides cheaper access to many of the same recent flicks you'll find on Netflix.

Perhaps the biggest coup of late for Sling has been landing HBO's stand-alone streaming service HBO Now, although it isn't called HBO Now, apparently because Apple still has an exclusive deal on using that name, but the program offerings do seem to be about identical to HBO on Sling TV.

The HBO back catalog is not 100 percent available on demand via Sling TV, but if you have Sling and Amazon Prime, you should have it all. Even still, we have been delighting in binging on newer HBO shows like Game of Thrones and Veep over Sling TV, as well as recent episodes of those aforementioned AMC shows. The video quality continues to be pretty impressive although not perfect, even over quite imperfect DSL and 4G connections.

This brings us to some of the flaws with the service that have become more apparent and irritating as we've spent more weeks with Sling.

First off are the wild inconsistencies in what features and programming are offered between channels. Some channels allow you to pause and rewind live TV, some don't. Some specific programs are not available due to programming restrictions, occasionally leaving you staring at hours-long blocks of a screen that simply says "restricted content" on certain live channel feeds. This seems to be fairly rare and due to network contracts, but when there's a marathon of Criminal Minds on, for example, expect a blackout of that channel.