Thanks for all forum experts. My family enjoyed out batam trip.
1).We stayed at I Hotel which just only 5 minutes walk to Nagoya Mall.
2). Although the swimming pool is not big, it is not crowded either.
3). The taxi cost from Harbour Bay terminal to hotel is 50K.
4). I have tried Eska and Sawadika which are both in Nagoya Mall. Eska is obviously cleaner and the skill is better but the price is much higher than Sawadika. It's fair.
5). The cinema is new and the sound system is good. The price is 20K rupiah per ticket.
6). I have tried 2 different Indonesian restaurants at the food street in Nagoya Mall. Both are good.
7). I was surprised and happy to find J.co at the mall which is as good as the one in Bali.
8). My wife brought a lot of children clothing at Matahari which the price is cheap and the quality and design is not bad either.
9). There is a video game center at Nagoya Mall. 1000 rupiah for 1 coin. Most of the game need just 1 or 2 coins. It's cheap. My children spent 3 hrs. there.
Overall, my family enjoyed our Batam trip.