I went into a Samsung store to look for a new phone for my partner and I was really surprised how sluggish all their phones felt, even the flagship models. I couldn't tell why it felt that way. Maybe it's the animations, or software bloat. The glass used on them seems to have a high friction, which contributed to the poor feeling. My partner currently uses an ASUS Zenfone 3 which is one of the snappiest phones I've ever used and it's a lower mid-range phone. I ended up buying her another one. ASUS are making some solid phones at the moment. Their ultra-books are nice as well.