Hi M.,
I got it off ebay a couple of months ago for my 18 month old. Honestly, I don't think at 6 months he would have paid much attention, he only liked the "Neighborhood Animals" baby einstein then, but each child is different. I only got it because my son is behind all the other kids his age, most of them have at least 2- 4 words in their vocabulary, and my son was yet to say any. I wasn't too worried because he knows objects and has plenty of talking/babble, but I got this anyway just to see.
I'm not real big on him watching TV, and have only used one DVD he really likes called "Baby Genius Nursery Rhymes". He loves this DVD and will stay happy in a playpen while I get a shower. It shows kids singing and dancing to songs he loves. I tried the "Baby can read" DVD and he did not stay happy in his playpen, however, he does stay interested if I put it in while I cook/clean, etc. I have to say, it has gotten him more engaged to see little kids saying words, and I can tell he is trying to say them. For instance, now the word clap comes up and he does say it and does it, the same with cat and dog now. I really don't feel like he needs to "read", but rather hear the words and associate them with the objects, and I do think this is good for that. I agree with others, reading to them is best, and I do this but sometimes I need a little help because he is not a stay still for Mommy kind of boy.
The DVD says to have them watch it twice a day, I only do it once a day. I'm not trying to really make my 18 month old learn to read already, I just wanted a show that could teach him something as opposed to some cartoon if I was going to have him watch anything. The same with the Baby Genius video I let him watch, that one is at least getting him to try and sing the words with the kids. I could not fork out the $200, so I ended up getting it on ebay for about $80. However, beware, I think the set you buy from the actual company came with more cards and other reading material to assist the DVD's that may be helpful. Most all the vendors on ebay, including the one I bought from, are only the 5 DVD's with flash cards with each.
Overall, I'm glad I got this for some occasional help. I do not have him in daycare where he watches other kids, so I think this has been helpful and the more he watches it, the more he seems to like it and try to say the words.
Hope this helps.