Pros
High quality, aesthetically very good looking keyboard with individual per key lighting
Huge range of preset lighting modes/programmable patterns plus you can create you own easily, the software is intuitive
You don't have to create an account to use Razer Synapse software, just use it as a guest (but it does need running in the background to use anything other than the default profile)
Can save different keyboard profiles to use with different games
Function keys/macros, media controls, volume rocker
Gaming mode to prevent accidentally leaving games
It is UK layout (with big Enter button and £ sign on the 3 key)
Cable routing options i.e. can have the cable going straight down
You can turn the lighting off if you'd rather not have it on
Haven't had a issue with greasy finger marks
2 year warranty
Spill resistant
Cons
I've found the space bar sometimes squeaks
The SHIFT symbols are the opposite way round i.e. the numbers are above the symbols / the @ is below the ' rather than above as normal
I tried adding colour to the wasd keys but it didn't really work due to the way the keyboard is backlit (leads to bleed through)
No wrist rest
Bit expensive for a membrane keyboard but it does have individually backlit lit keys and loads of features so it's worth waiting till it's on offer (got mine for £49.99)
EDIT - I removed two stars as the some of the keys are wearing away creating light bleed through (after months not years). Should have read some of the other reviews regarding build quality (but is a good keyboard in every other respect though).