I recommend it, but also read through my full response to ensure this is the game for you.
This game is pretty fun, actually! A lot of my gameplay was done with the swing option and thumb-stick moving as opposed to any of the other controls. Getting the timing of the swinging down was fairly satisfying, and feels like it more accurately 'game-ifies' Tennis compared to other VR Tennis titles.
It's to say that the physics are a bit wonky and unrealistic--but it's good fun. It was clear that compromise had to be made in emphasizing the importance of timing and impact point of the ball on your racket as opposed to other factors--and the detection of what return you do (topspin, slice, lob, volley) is very reliable with the exception of flat and drop. I just flat out can't do a drop on command and a flat shot replaces topspin and slice at will.
Combine with stats (discussed later), and you're able to add a variant amount of spin on your ball depending on how you swing your controller.
Unique to this game, you're able to see the trajectory and best return point of said trajectory. Being within the path and not moving will allow you to charge up power for your return. There'll be a drop of water sound effect when you've reached 100% power.
Furthermore, to add to the game-like feel of the sport, you and your opponent are given Stamina that drops depending on if you run/walk, how far you move, how much you stretch to get the ball, and other stats. You take numerical damage. You can restore your stamina ONLY during intermissions between games, which makes it difficult to keep rallies going for too long.
The game has an added element of stat distribution and leveling up through your matches, which will allow you to spec into a playstyle you'd like more. (EDIT:) Stats are incredibly important, and will dictate how fast you move, how accurate you are (gives you less chance to hit out), how fast your serves are, how much damage you take from returning, how little time it takes for you to act after swinging, and your maximum stamina. Combine with how you return in this game, and you'll be able to add some pretty devious spins on your returns, which feels amazing.
As a big warning, the UI is a bit of a headache to get used to/navigate around (but has been improved tremendously over time as far as I could tell). I also had trouble with attempting drop shots in the game--even returns with no movement sent the ball flying deep into the opponent's court.
Furthermore, aiming shots seems to be a bit wonky at times--but it's more or less something you'll need to adjust to with time. I also lament the lack of more option of making your player character a cyber/robot character, but that's a bit of a nitpick. Furthermore, in tournaments--the level difference can make or break a match. With good reaction speed, it's possible to fight opponents who are 10+ your level, but it's still a very tough fight.
Updates have been at a standstill, and I don't believe we'll see much in the way of content updates in the future. What you see is what you get, and on the graphics side, it's on the lower-end. This becomes more apparent when you get up close before a match starts.
Furthermore, the text-to-speech is a bit jarring at times, but oddly charming in their own right. This becomes relevant with pre-match, in-match, and post-match dialogue choices. "Oh crap!" is "Oh clap!" and it's pretty charmingly funny.
Doubles with an AI partner is great fun--even against other AI or against a friend. I kind of wish there was a mode where you can play doubles where a player is your teammate and you both fight against your AI partners. It does seem like a steep investment to buy this game for $20, but I think it'd be worth it around $15 if it ever goes on sale.
EDIT: I was at 3 hours when I first wrote this, and this game has consumed my life. It is charming, even if it could be feasibly seen as low-quality--enough to where I'd suggest someone try it. There is no multiplayer scene, which is unfortunate, but the game is a blast that I like returning to here and there. Leveling up pits you up against more difficult foes, and the matches can get pretty hard to react to without some training. I would love more updates.
