IOI Prop - They deliver house and infra, nothing more. Unifi - no. landscape - as it is. But they are reasonable if your demand is reasonable (no need BIG buck). They do fix your house if needed & reasonable. After sales follow up are good too. But limited to "reasonable low cost" thing only.

SIME - Overall good, but I have never come to a point where I have big issue with them, workman ship ok ok lah. They deliver.

SUNRISE (before uem) - above average good to their building management and standard. I have strata shops with them, they are strict but it's benefits all. High standard of tools and finishing.   

I&P - like IOI prop, but worst lah. U know lah, ask them to work is very very difficult one.

Gamuda - I used to have shoplot with them. workmanship very lowyar, crack here crack there after 1 yr. Many things to patch.  Have to think carefully before buy from them again.

Glomac - undercon. No comment.

Perdana Park city - undercon. But so far so good. responsive and friendly sales team.

Tanming prop - undercon. workmanship #1. much like own renovation ! thumbs up to them.

MCT - undercon, heard and saw their workmanship tak boleh pakai. Scary. Hoping outcome not too bad.

SP Setia - reasonable good management team. Average workmanship. They do deliver as promised.