This is our 2nd Shark vacuum, the first was a Navigator purchased around 7 years ago, which was ample but we decided we needed a more powerful vacuum having 2 dogs.  The Stratos is definitely a rock star, not only does it really fluff up the carpeted areas but also pulls in debris along baseboards and does a better job overall.  My only complaint is the quality of and the lack of LED lights, my older vacuum had many more LED lights and were much brighter.  In reviewing the specs of all the vacuums, it looks like this feature has changed whereby there are less, but we found these to be very helpful when cleaning an area you think isn't too bad but then see the dog hair or dog cookie crumbs you didn't realize were there!