Product review (4 stars): Efficient and Effective
I have now had the product for several months and feel I can safely rate the the Infiniti at 4 stars.  My Hair is past the shoulders, thick, with medium curl,  and slightly course. It is highly processed.  I have a full keratin treatment every six months and roots dyed every three weeks with highlights every other or third month.  My greatest concern is damage from heated appliances.  I am pleased to say this product shortened my dry time from full 40 minutes with couple 5 minute breaks to 15-20 minutes with no breaks. Normally, I straighten with flat iron after as well. Using the Infiniti Pro makes that process super easy as well - because I am able to get such a smooth straight finish just from drying. Be warned - there is a big learning curve.  It takes a couple times to get the forward and reverse down - and practice is needed to get the best style.
  I have found 2 negatives: (1) It is heavier than expected.  That being said - it is still easier than trying to hold a dryer and brush. Especially - makes getting back of head more efficient with much better outcome. (2) I get a fuller root than I care for.  The hair, in general, is fuller as well.  This would probably good for someone looking for body - I have plenty to begin with.
  Just a couple tips.  Make sure hair is well conditioned. This makes the hair glide easier through the bristles. Also, slowly and intermittently, advance the brush from root to end - so the hair doesn't wrap around the brush completely.
  The only thing(s) I would change? I would prefer a different bristle - maybe slightly firmer. I think it would smooth the hair more effectively. And I wouldn't mind more heat. Fix these issues and I would give 5 starts.
  Just as a sidebar I have tried the Conair Ionic Styler (with brush and comb attachments).  In comparison - this product is much more effective. The attachments came off the Styler and broke in no time.