If you want access to additional TV channels, subscribing to Sling Orange for $20 per month with the $15 HBO add-on could be a worthwhile investment. You'll be paying $20 more each month than you would for a standalone HBO Now subscription, but will be able to watch far more channels. If, however, you don't see yourself tuning in to the addictive home makeover shows of HGTV or the dramafest that is The Bachelor, save your money and opt for HBO Now.