I use Vlingo all the time. It does take some time to get used to, but it does learn your speech patterns. You will have to correct so voice to text, but this decreases over time. I wished it was cheaper also, but look around for discount codes...you should be able to find one.
I'll get it in a week or so, im on the lookout for a discount code. hint hint
Hopefully you will get your discount code. I run the free version and I am satisfied with it. It does not offer the same great qualities as the pro, but I'm not willing to fork out the money for this application yet.
My dad uses Vlingo since he is getting older and has carpul so the keys on his storm take him longer to type on, he loves it and if I remember correctly he did have to train it but after some time it runs nice and smooth