I prefer gateless - it makes the house look spacious at the front part.  Of course many people have different thoughts and preference.  I think no need to argue or debate, else until cow come home also no end

I heard the land there should be soft, potential to "sink" after years. Anyone can clarify this?

You guys should double think before moving to Eco Ardence. Here are two main  issues that sales agents won't be telling you, but residence complaints!

a. Air pollution is one of the worst issue, especially during night time. The source of air pollution remains unclear, may be due to the errant factories around the areas (e.g,. Meru, Bukit Raja), illegal burning and so on. Smelly air can fill up your home, most of the times during evening until the next morning. Much have been said about greenery around in Setia Alam and Ecopark, but it doesn't work.
Current solution: Stay indoor and use air purifier for the rest of your time living here if you don't mind.

b. Traffic jam during the peak hours. The bottleneck along Setia Alam link connecting Jalan Meru and the toll plaza experience one of the worst jam, even worse than the NKVE, despite the many vacant units like Trefoil, Taipan and the apartments, as well as the 1NIH when up to 6000 people work here. 
Suggestions: Ask the sales agents to show you the estimated population here and justify how the roads are going to support increasing population.