PerfMad

Guys, I'm hoping to install a Short shifter to my Honda City. I was doing some searching on internet and found out couple of brands where price varies. I would like to know the following;
1) Any DRAWBACKS of installing one?
2) What is the best or reliable brand?
3) Will there be any issues with shifting gears? Because I once drove one of my friends ek3 with a short shifter and it was bit difficult to put it to Reverse gear
4) Any other advantage other than the short throw?

Note that, I'm planning to use my existing original shifter knob (since my mechanic told me, shifter knob weight plays a role in shifting)

Hoping to hear from you experts !!!