Well i cant really comment on 3M, though i feel should be good as 3M is a good brand.

However i have Garware (light silver shade) that almost looks transparent. Dont know the exact figure but i got the highest sun reflective index figure available in that category installed.
There is a replica of this which is much cheaper but the looks are drastically different. the replica is more shiny and looks are similar to a mirror.

Looking at purple car, this shade will look excellent, try it out once.
Apart this shade you have option to go for dark black shade if you like that. Though it may not be approved from the Traffic Department.

Thank You Mir. Anyway i got to check out both garware and 3M. How much did it cost for you when you installed them? And since your film has got highest reflective index, does that hamper your visibility?

The film does not have highest of all, but highest in that category of films.

Check this link whee you can have an idea of how does it look like.
http://mahindralogan.forumotion.com/gallery-f8/if-you-like-it-dark-fiery-black-is-the-way-to-go-t351.htm?highlight=fiery

There are a couple of day light pics. Visibility is not at all hampered.

It costed me somewhere around 2800 for all except front windsheild.

Thank You Mir.. the film looks really good for your car. Do you remember the exact model no. for the film that you used?

No. I dont have any model number etc. But i guess you can get that easily from the automobile accessory shops.

Thank You very much Mir

Garware sunfils are the only ones approved by RTO's across India. 3M has been working to get some approvals for thier range but nothing so far.

I myslef have installed 3M films. They are doing a pretty good job. Costed me about 3500 without front windshield.

Llumar and VKool are good brands too. But are more on the expensive side.

Good luck anyway.

And yes, a word of request. If you do find Side visors when you go to get your sunfilms done, please enqquire if they have the genuine logan accessory.

Thank you so much vsuprak. Will let you know about visors if i come across some. By the way which series in 3M did you install? How is the heat rejection?

I dont remember the series. But i think it has 70% visible light penetration.

Heat rejection is also good (i dont remember the %). It does look a little darker from outside.
If i can recollect, it was the 3rd darkest from the top. (Not legally approved by RTO & Cops). Bangalore still does not have any regulation on sunfils

@ Logan_liverinDelhi,

They did have the regulation in force for about 6 months (that was almost some 3 years back). But they eventually stopped enforcing because most of the protest was from our very own BABUS (read politicians) and cine-stars.

So as of now, there are now regulations, or enforce of them, if any.