I think that more than learning to read, babies need interaction. There's a reason that it's not recommended to have babies watch ANY TV at all. Babies learn best from people, not screens. I think it's great to have the tools available and interact with your child, but if they'd rather play with trucks than letter, let them. Those trucks are teaching a valuable lesson, too.
We had some magnetic letters for dd and she knew all of her letters at 19 months - she had never seen a video in her life at that time, but we read a lot. It was just interest and asking and interacting. Then she just stopped being interested in letters and moved on to something else (puzzles and building, I think). I didn't push it. I knew she'd do it when she was ready. She was 4 before she started showing any additional interest and we got her some early readers. Then, without any prompting, the summer before Kindergarten she just started reading without me even knowing. Before I knew it, she was reading proficiently. It CLICKED. She is now the best reader in her grade and reads anything from her level to several grades above her. I didn't do anything... at all... other than read to her a lot and provide the tools. (She does attend a private language immersion school, so they were teaching her pre-reading skills for the target language, not English. Practice for English was all at home until 1st grade, but we didn't use a "program".)
I think the synapses have to develop and until they do, there isn't any amount of forcing a child to do something before they are developmentally ready. It's a waste of money, time, and probably patience. I've seen the ads and it looks like a rather ridiculous program. JMHO.