Nobody with a brain would fly a procedural approach if they are offered vectors
Why complicate matters for oneself, and for the ATCO who probably has not done a procedural approach in many months.
Otherwise, the main reason to ask for one is for training/practice, but I would still not do that in relatively busy places abroad because the ATCO will have quite possibly slotted you into his arrivals stream on the assumption that you will go straight in.
It's a similar argument to hand flying approaches when one has an autopilot capable of flying an ILS down to 200ft. IMHO one should make full use of cockpit automation, and do one's hand-flying practice in Class G where nobody is watching