The lid fits all the three units perfectly and I love that . I use the Kadai to make fried rice and its non stick surface works great. In fact all the three pieces look like great quality stuff - thick bottom and durable non stick.
I found the Kadai beautifully flat and broad bottomed but a bit short, would have liked like it to be 2" taller to cook good quantity. The handles for kadai and pan are are fitted with screws and not reveted like the tava so the chance of handles becoming loose and coming out is very less. The tava is about 1" smaller in diameter than the other Prestige Tava
Shall update review about any adverse damage if any to non stick coat after good usage.
The non-stick surface is really good for cooking - nothing sticks and one can simply wash off the kadai after use. Having said that, be careful even when using wooden spatula - gentle toss only as the surface is very suseptible to scratch
Simply love the product - practically all my cooking, heating is done in the kadai .gently wash them after use.