I was glad to see that this episode brought back some of the earlier season sparkle, with the "biting at the heels" back and forth between Castle and Beckett, over who's Valentines day present would trump the others.
Also the old Castle charm was back - as he tried to sweep Beckett off her feet with his lavish Valentines present, only to put him under an embarrassment cloud with Capt. Gates (old school Castle - something I have missed for a while now) -- the ending was also quite sweet. Overall a really solid episode!
Hopefully, they will continue down this path and bring back more "Castle - the writer" inspired episodes where, his knack for plotting colorful yet plausible scenarios and high maintenance lifestyle entertained us. The recent "Castle - coffee bearer" episodes seemed like a waste of talent to me.