:D!

What is your Priority Club status?
Spire

Were you (or for multi-stayers are you generally) happy with the hotel/stay?
Yes

Which room did you book and which upgrade did you receive?
Booked standard - received junior suite

How are the rooms?
Spacious and clean, great day and night views (entire wall is a window)
Got free drink vouchers to use in lobby bar: for coffee, tea and soft drinks ONLY
Free wifi for everyone without login
No more fruits or cookies as reported earlier this year. Also read elsewhere that a Spire got free breakfast earlier this year - not the case for me
2 bottles of water + plenty of interesting teabags and nespresso machine in room.
Big sign at front desk regarding the "removal of elite benefits for non direct bookings". Despite already obviously having read the sign, the clerk felt the need to specifically re-read it aloud to me after completing check in.

How is the exec. lounge?
none

What was good and what was bad?
Room was really nice, better than rooms at many ICs
Convenient for metro and airport shuttle bus (number 6707B departs ICN stand 10B, price: 7000 won each way in cash or T-money, timetable on KAL limousine website)
However, Metro takes at least 100 minutes and may involve 2-3 line changes (= 5 minutes walking up and down) to get anywhere useful in Seoul (note to self: Incheon is not Seoul) and had to stand most of the way back - but very cheap at 1950 won T-money or 2050 won cash.

Free shuttle van departs hotel at 1130 and 1730 for a 30 minute drive around Incheon. The shuttle appears to be parked outside the hotel for the rest of the day. Not sure how this service is useful to anyone.

Value for $ or Priority Club Points? Would you return?
Paid 15000 points, would stay again if wanting to visit Incheon itself, or needing to be at the airport early.