As far as SIOM is concerned, it is one of the best institutions in the country for operation management. It is known to provide 100% placement but it is definitely lacking in basic amenities like infrastructure, decent faculty, good academic management as well as flexibility, and campus facilities. But, SIOM also has some really unique infrastructure like the SAP lab and supply chain software which you might not find in top universities either.
However, if you are okay with adjusting to these parameters and your only focus is on studying and you would like to build your career as an operation manager, SIOM is a really good option as you will come under the Symbiosis banner.
Moreover, you should go for SIOM only if you do not get a call from other universities like IIMs, NITIE, SP Jain, XLRI, NMIMS or JBIMS. You will notice that the packages are a little on the lesser side as compared to the mentioned colleges but it is quite acceptable if you are fresher. SIOM will give your career the boost it needs.