TextBoom is one of those companies that you find and wonder why you hadn't found them before. They are hands down amazing, the people and their system. I've used 4 other companies for text.. and I mean for years.. before I found TextBoom, which was actually referred to me by another business owner. At first, I really thought something was off because their pricing was wayyyy below their competitors but my buddy had success with them, so I gave it a shot. Here I am 3 years later and like I said, I really wish I found them sooner.
Specifics: The system is robust to the point it takes a bit of getting used to but it's awesome once you get the hang of it. The pricing is by far the best in the industry, just look at their pricing page and compare. Besides pricing, the biggest "pro" for me was their experience and advice for my campaigns, I've never seen better results.