The service that started the cable-replacement trend is still one of the best on the market. Sling TV starts off cheap ($20 per month), and while the cost can balloon quickly, depending on your add-ons, this probably won't happen. That's because Sling TV offers two basic packages of channels (Orange and Blue), then lets viewers pick and choose smaller add-ons, which usually cost $5 per month. From sports to comedy to kids' programming to foreign language channels, Sling TV has a little something for everyone. The service's DVR features are not bad, either.

The question of "when does it make sense?" can easily be rephrased as "how much money can I save?" and one of the biggest factors will be the price difference between combined internet and TV service or just internet. These are also the options that vary the most widely based on where you live, and the availability of promotions or contracts that can keep prices down for a short time.

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