Old topic, but this Mini Installation article (last updated 03/25/2014 01:09 PM) is quoting max 12 TiVo devices per account: http://support.tivo.com/app/answers/detail/a_id/2557 Home Network and Account Requirements - All TiVo devices must be on the same TiVo account. - Your TiVo account must be activated and in good standing. - A maximum of 12 TiVo devices per account, including TiVo Mini, can share programming. - The host DVR must be a Roamio Series DVR or a 4-tuner TiVo Premiere Series DVR running software 20.2.2 or above. However, their terms of the User Agreement (Effective as of August 20, 2013) has : https://www.tivo.com/legal/terms Restrictions You may have a maximum number of 10 TiVo devices (excluding only the TiVo Stream) on the same account. Anyone know for sure which it is?