Any metallic based tint, cannot use RFID on WINDSCREEN. RFID cannot be place too near to metal as they may interfere with RIFD signal.
All my RIFDs are stuck on middle of left headlamp.

Smart tags worked with VKool Elite.

However as mentioned, all metallic based tint are not compatible with RFID.

If no metallic signal interference, that means the metallic tint does not contain enuf metal sputter.   

The issue with VKool Elite are the pricing nowadays, it is way too high...

The last I checked, a Civic FE with specs as below
1. Front Windscreen - Vkool 70 Elite
2. Side Front Windows - Vkool 50
3. Rear Windscreen and Side Windows - VKOOL 30.

are officially quoted RM4850 from VKool PJ HQ about a year ago, now maybe higher. Sure you can get cheaper outside but make sure it is original VKool, not fake ones. Still cheaper or not, the pricing will still be significantly higher than most competitors.

In terms of durability of VKool Elite, I just changed them off this early this year for 2 cars, 17 years and 15 years respectively.
My proton still using it but started to blur a bit now...and this car always parked outside in hot sun, abt 12-13 years before it goes. That is how durable it is.

As for reflections, what do you mean by reflection and mean bad on VKool Elite? VKool is one of the top bright and clear tint in the market.

For Irispro, they are quite new to market (a few years) and are building their local brand name with dedicated installation shops with 10 years warranty and 10 years performance warranty for their premium flagship metallic tints, from DX to Elite. So that does give some peace of mind if quality degraded after a few years.
Unfortunately for me, silver-based DX series and Diamond does not have 70VLT clear tint but Diamond 60 is pretty clear and not too far behind in actual brightness in the car.

My DX FWS should be the DX60 with 55% VLT (real life FWS is about 52% to 53%). I would have prefer brighter front but when I install, they have not introduce the DX70 yet. Still not the 70% VLT I initially wanted after VKool experience.

Oh...the VKool Elite even if marked as 70%, after install on my old City, its 66% VLT, will still fail Puspakom. Depends on car FWS colouring and thickness kuah.

Nah, just tint a good clear tint with 70 or 60% VLT. Usually never get stop as they look like clear tint.
It is those tinted obviously dark aka below 50% that usually have risk of being stop.

These tint only need to be remove if you sell or transfer ownership of car. Otherwise, I don't see any issue in slapping in a GOOD 60-70% clear tint to add heat resistance and dashboard protection.