Used to stay in Goodluck Garden (which is now Forett). My 2c on living there for many years, for what it's worth.
No one really walks to the MRT station from there. Most will take service 173, 77 and 41 and it is 3 bus stops away. You also have to factor in the walk within the development - it is a big site, as well as the walk from the bus stop to the MRT (not directly linked to the station. You still need to either cross the road to Toh Yi side or walk 240m to Cheong Chin Nam entrance).
You can also forget about rental yield in that area for various reasons already mentioned by others. There is also an upcoming GLS site at Jln Anak Bukit which will be directly linked to BW MRT. If you don't care about condo facilities and just want to live near Pei Hwa , nearer to the MRT or nearer to F&B outlets, tenants can also choose from plenty of HDB flats at Toh Yi at only $2k+ for a 4rm flat. BW MRT and food centre+market at your doorstep and Cheong Chin Nam just across the road.
Also just FYI in case it matters to you, Forett is under Jurong GRC, not Holland Bt Timah GRC. Toh Tuck Road is the electoral boundary that splits Jurong GRC and HBT GRC. Toh Tuck is really not Bukit Timah, but those staying there in the area will say they live in Bukit Timah - whatever makes you feel better, but we all know Bt Timah really starts at Dunearn Rd.
Living there was great - Goodluck Garden was a relatively low density development with lots of open and communal space, but unfortunately was starting to show its age. Not sure if Forett will be the same, but seems like Singaporeans like to be able to look into their neighbour's master bedroom and be close enough to greet them these days, so this development might still be popular.
Also not sure about the name. Supposed to be a play on the French word for Forest, but sounds more like a Chinese developer who cannot pronounce forest. Also sounds like "ferret" to me