Going at the Pen since 2003 2 or 3 times a year, for us great location and even better since the last few years as you have the Icon Siam mall just at the corner with its BTS Station.
Some ''geeks'' may find the room outdated but in fact Peninsula each year modernize the rooms and even if the design is the same since the opening they have been refurbished several time.
Last year following the reopening the restaurants were not at the level they have too but now solve....
And the swimming pool is for me one of the best of BKK.