When researching for a new hair dryer (my previous one broke), I knew I wanted a great hair dryer but didn't know what to get. In my research, Solia and Sedu were the two hairdryers that I found to have the best reviews. Reviewers raved about hair drying much quicker, smoother, and with less fly-aways. As someone whose hair takes over 45 minutes to dry I didn't believe the claims that it could take 5 minutes to dry hair. I got the Solia hairdryer for a Christmas gift and have been AMAZED with the results! My very thick and very coarse hair actually drys with Solia in about 5 minutes! It's amazing. I will dry my hair for 2-3 minutes until it feels dry but is slightly damp. I'll give my hair a chance to cool and then dry it another 2-3 minutes and it will be completely dry, soft, and smooth! I would not typically be someone to advocate buying an $80 hair dryer, but this hair dryer is truly phenomenal. I'll admit that while I know thermal and ionic are beneficial features for hair (I'm all about the ionic hair straightener!) but I don't necessarily know the exact reasons. All I'll say is that the Solia hair dryer is phenomenal and gets my vote as a must have beauty product!