Using Hitachi Spilt 1.5 TR for 6 yrs. If installed properly they run well even without voltage stabilizer etc. But Hitachi is terrible on customer service front in India. The Min resp. time for complaints is 3 working days & they charge a bomb for service & spares (instead rely on a good technician of other reputed brands).
Their products are not at all Value for Money for retail public, except for those who use ACs almost round the year or for those who do not have to pay anything from their pocket to buy & use them.
You get better substitutes from Samsung, Bluestar & O-General for min 20-25% lesser cost.