Is Text Message Marketing the Future of Online Engagement?

Does anyone have Text Message Marketing in their portfolio of marketing concepts? I have been looking at various programs online because this marketing is said to be more effective than email marketing because it goes directly into the voicemail boxes of the client. But, is it too intrusive? Some of the cons to this type of advertising include: *The Best Engagement Rate Text message marketing has the best engagement rate of any marketing medium. Emails can go unread. 90% of text messages opened & read within the first three minutes Mobile phone ownership among adults is close to 95% worldwide. SMS text messaging is the communication tool with the greatest reach around the world. What do you think?