As a resident of Putra Heights I have to say that this location is not bad at all.
With the interchange before LDP coming from USJ side, we're completely free from getting stuck in LDP Puchong traffic everyday after 4pm.
Going home is a breeze from Shah Alam/USJ comparing to those coming/going back towards Puchong.
So far I'm enjoying so much the serenity and convenience around this location, do hope SD Serasi won't bring in too much traffic.
LRT Subang Alam and Putra Heights are equally close from where I live.
When taking LRT my friends were indeed jealous about not having to choose SP or KJ line.

Within this locality there is ready population catchment to spend $$ but lack of businesses and retails.
Whether successful or not, it all depends on how the developer is gonna make access to the site and who is the retail operating team.
Retail in OneCity isn't successful, however across from it Mainplace is doing good business with the right mix of tenants (not forgetting that it used to be abandoned).
Lunch and dinner time are always busy even on weekdays.