Singapore Index Fund

The Singapore Index Fund is invested to track the ST Index. This can be bought in SGX like an ETF. I was told that it can also be bought like a unit trust. The annual management fee for this fund is 0.55% (i.e. slightly higher than  0.3% for StateStreet and 0.28% for DBS). However, being a unit trust, it allows smaller quantities to be bought, instead of 1,000 units in an ETF. If you have personal experience in investing in this fund, please share it.