I think it's really great that an important piece of history is in Singapore, but Bedok Reservoir Park is kind of an odd location for something like this. It seems out of the way and I don't know if it's getting the type of foot traffic it deserves. A cafe is opening next to the display which might change that though (it's scheduled to open this month).
If you want to check out the Berlin Wall in Singapore for yourself, head to Bedok Reservoir Park near the intersection of Bedok Reservoir Road and Bedok North 3. The enclosure looks like this:
And if you can't make it to Singapore, maybe there's a piece of the Berlin Wall closer to you. Check out this list of Berlin Wall segments all over the world.