Floyds are excellent at keeping a guitar in tune when using a whammy bar. There are only a few issues to consider. Changing the tuning can be a difficulty and it requires re-setting up the bridge in regards to leveling it out. The change in tension makes the bridge sit at more of an angle forward or backwards, depending on whether you are tuning to a higher or lower pitch. There is a device that you can install called a tremol-no that can solve this issue. Another issue is they tend to take a little longer to change strings on. Also, when doing something like a double stop bend one of the notes will go flat as the bridge tilts forward just a tad on the bend. See tremol-no section for that problem as well. That is about it as far as drawbacks. If you use a whammy bar for vibrato or dives a Floyd is a great locking system.