Each method has its pros and cons, with a few things to consider before choosing which installation process will work best for your home.
Floating floors:
Pros
+ Inexpensive
+ Damaged plank can be easily replaced
+ Expand and contract as a one unit around the perimeter of the room, where the skirting boards hide the expansion gap
Cons
+ In case of uneven ground makes spongy feel underfoot
+ Can feel hollow and loud underfoot
+ Door thresholds between the rooms are necessary
Glue down floors:
Pros
+ Can be installed without door thresholds between rooms
+ Reduce stepping sound and create a highly-stable floor
+ Allows underfloor heating to be distributed more evenly
Cons
+ Installation is more expensive
+ Replacement of damaged plank is more time-consuming & expensive
+ Expansion and contraction occurs separately on each board. This can lead to micro-cracks between the boards, especially in dry climate