Greetings, Jagan.

IIITDM Kancheepuram is definitely a good college (many rating websites have rated it generously). The college has a 52 acre campus appreciated by all the current students which is always a plus in my books!

Now, regarding your query - from the data and reviews I could find and read online (I did a lot of searching and reading), it appears that internship and placement opportunities for Mechanical Branch at IIITDMK are average as in the avg. package offered in 2019 (to Mech graduates) was around 4-8 Lacs per annum and the placement rate for the Mech branch also seems to be on the lower side (with around 32 Mech students placed in 2019)

so the pros include - great campus, good faculty, good hostel

and the cons include - average placements and internships, distance from city (about 50Kms)

If you are aiming for further studies after Engineering then I'd personally advice to go for it but if your circumstances demand you to be placed right after college into a good job then I don't think it is worth the risk (assuming the placement rates remain same 4 years from now)

If you have other alternatives then do compare them in terms of placements but if you are sure that you can somehow find better opportunities on your own (out of campus placements, finding good internships on your own, etc.) then you may very well survive with a good job at the end.

It is up to you so take your time but don't miss the deadlines! best of luck for your Engineering experiences ahead.