I prefer to have separate, easier to maintain.

Getting the separate set,
1. you no need to have a dedicated "hole" for your all in one set.
2. you no need to squat down to take something, always squat down are good for giving business to doctors.
3. cost always much more higher comparing to buy separate.

That's right, considering Malaysia's LPG quality, I'll get decent burner that cost rm50-100 and call it the day.
Not to mention cleaning also.

Good quality LPG should gives you blue fire all the time till finish.
But only first 10-30% blue fire, then become yellow(sign of incomplete combustion).

For me I won't install any, money will be wasted if the tenant abusing it.