Has anyone powered down their Steem power yet?

I'm thinking of increasing some more steem power but I would like to know a bit more about it first.

I know you can power down in 104 payments or choose another option of 1 year powering down and then getting the whole payment... This is the info I've come across so far while reading SP related posts and blogs!

So my question is could any of you guys who come across this post let me know what your experiences have been so far in regards to powering down your steem power.

For example Is it worth powering down at this point in time ? does the share price make a difference when powering down?

Let me know if any of you have already done some powering down or are in the process of doing it, was it worth it?

Can you power down lets say half of your SP and keep the other half?

are there Any tricks or tips that i should know about.?

Cheers!