Jimny Stage 1 Tuning: Pros & cons and who should do it and who should not

Hi Everyone

I am Palash Gupta form Indore.

I have a BB Jimny Alfa MT, completed almost 10K kms in it. I want to discuss the aspects of Stage 1 Tuning, pros and cons of doing so. Also who should do it who should not.

If anybody here have done it, do share the details and estimated costing.

Thanks
Palash Gupta