I have flown on Czech Airlines four times, twice from the Malaysian city of Kuala Lumpur and twice from their hub airport of Prague to London, and have found them to be quite a reliable airline.
All four flights were punctual, the in flight service was good, the food very good and the copious amounts of fine Czech beers were very acceptable to this reviewer.
The airline has quite a good network and the ground service is OK if not exceptional. All of my flights were smooth and the aircraft were comfortable enough, although the flights from Kuala Lumpur were on old Russian built aircraft.
The cabin attendants were genuinely helpful and I remember were very helpful when I enquired about where to stay in Prague.There was an interesting in flight magazine to read and a reasonable variety of international magazines and newspapers to have a look at.
Another plus point is that I found their fares to be very competitive-indeed on the Singapore/Kuala Lumpur sector they were among the cheapest, although Aeroflot were cheaper still. I understand too that the fares from Indian cities on Czech airlines to European destinations are also quite reasonable.
If you have not flown Czech Airlines before I would suggest they are well worth checking out, especially if you intend visiting the Czech Republic or neighbouring Eastern European countries.