Lets discuss the pros and cons
cons first:
If there is an electricity cut, you wont be able to operate it, the gas is ever-ready.
Its great to make tea, coffee, boil milk or eggs, but the use is quite limited when frying, making rotis or dosas and its not the best option for dry cooking .
When cooking you need to take utmost care that a lot of liquid spills do not happen .
You need special utensils which are induction friendly like cast iron or stainless steel vessels, you cant use glass, ceramic or aluminium vessels .
You need flat base vessels, which cant be too small or have too big a base .
Generally you get only one cooking area not 2 / 3 or 4 placeholders like in gas cooking.
now the pros.
You can operate overhead ceiling fan while cooking .
The liquid comes to a boil at an amazing rate, almost half the time it takes on gas flame cooking. Tea, coffee and milk should always be boiled on an induction cooktop, not on gas .
No fire hazard .
Compact and hence lesser space required .
No need for a refill .
Other considerations while buying a cooktop.
But one like philips HD4938 which is a full glass top as its maintained easier, I have 2 of these working very well since many months for my 2 flats .
Make sure you have enough space around the cooktop to allow good ventilation.
Never dip or immerse it in water after use .
Dont touch the top surface after use as it will be very hot .
There is no need for very high wattage units as it wont be required at most times .
When buying look for features like future cooking, pause and child-lock .
Use a 20Amps socket for safety as the appliance draws a lot of current .
Never extend the cooking vessels onto the control panel as it may damage the cooktop.
The base fan may become cruddy from time to time and one should clean it for better performance and life of your cooktop .
Happy cooking!