STEM Extension

[thaisvinholo]

Hey,
Does anyone know how long does it usually take to get an approval of a STEM Extension? How likely is it for a STEM extension to be granted if your employer is E-verify and you meet all the other requirements?
Also, is it OK to go back home during the STEM extension with an expired Visa Stamp? (I know I will have to go to the Embassy to renew my stamp, right?)
Thanks,

[biologyphd]

your experience please

Hi,
Did you go for VISA stamping while on OPT? Will be very great ful if you can give us your experience in this case.
Thank you very much!