I originally watched this because I saw it contained similar elements to The Romance of Tiger and Rose (main couple goes from modern to historical times, FL goes back as a villainess while the actual "heroine" spirals, etc), but I think I like this one more! The historical plot is better written, imo, and the leads are more likable. It probably helped that they started off in a relationship and it only grew throughout the series.

PROS
❀ Loveee the OST and soundtrack | I'm obsessed with the opening song, which is so light and fluffy and romantic and a perfect reflection of the drama's tone. I thought the writers did a wonderful job mixing the historical with modern elements, which showcased for some hilarious scenes (ex: playing Beethoven's 5th on the zither when the cast was trying to join a music competition, dancing the tango for the competition, etc).
❀ Understanding FL and loving ML | Even though in the beginning of the drama, the main couple's relationship was strained due to Tu Si Yi's (the ML) fame as a musician, the FL stayed strong and devoted when she went into the VR game to get him back (and despite a lot of obstacles). I loved her upstanding attitude and thought the actress did a wonderful job with her role. Despite the ML losing his memories for a bit in the drama, you can still see his love towards Zheng Zheng (the FL) even though he doesn't quite understand it. It was sweet seeing him "fall in love" again and their reconciliation when he regains his memories.
❀ Lots of side couples to root for | And the fact that they all get happy endings in the last episode... *chefs kiss* We love to see it. Even the villain (second prince) is more hilarious than evil; you really can't take him seriously. Superficial plus... but all the actors/actresses were gorgeous too hehe.
❀ In general, each episode brought a smile to my face | Seriously, some of the characters' antics were so funny (especially the second side couple with TSY's lil sis and Cui Xun). If you don't take this drama seriously (which you shouldn't, going in), you'll be left with all the warm fuzzies each episode.
❀ Wonderful happy ending in the modern times | In To Get Her, the main couple is trying to get back home ToGetHer (get it?) and make awesome relationships along the way (although technically I guess the rest of the game characters are NPCs, lol). The length of 30 episodes was perfect to keep the plot tight and flowing. It's light-hearted, playful, and features lovable characters.

CONS
✕ VR game details were underutilized | I think the scriptwriters got a little lazy with the video game component. You reallyyy have to suspend reality to let the details for the VR game slide by (which is fine, since this is a romcom and not a scifi, but they could have done so much more imo). After the FL goes into the game and looks at her stats, there's not much "game-related" options that happen. She gets some random skills here and there that didn't add to the plot and the explanation for getting their consciousness back by beating the game was a bit iffy. Not a big deal, but kind of a lost opportunity.
✕ Misunderstanding level: 1/10 | Not much in this drama... I'm adding a point though, for the inherent nature of the plot where the ML lost his memories and wasn't in the know for a bit. There were also small misunderstandings in their relationship in the modern time, which were resolved quickly. None of those "I pushed him away for XYZ" or "she didn't know why I did XYZ for her own good" misunderstandings that last for episodes.

OVERALL
Hilarity + couples you want to root for + low stakes game = fun romcom that'll leave you smiling.

(Note: My rewatch value is set to 5.0 always as a default as I'm not the type to rewatch dramas EVER. Thus, I do not take it into account when calculating overall score.)