Mario Super Sluggers has been out for awhile now, and the reviews are starting to pour in. For the most part, Mario Super Sluggers is getting pretty mediocre reviews. Most have been saying that the video game has a good arcade style fun to it, but is a little on the easy side. Here's a review of the reviews (if you will), hope it helps in making your decision on a buy or no-buy for Mario Super Sluggers.

GameSpot - 6.5:“Despite its many shortcomings, Mario Super Sluggers is good enough to offer some solid entertainment to the right gamers. Collect-'em-all Mariophiles will dig the new challenge mode, and Wii party hosts will enjoy playin frantic multiplayer video games. More serious baseballers will find satisfaction in facing off against one another, but will find the rest of the package wanting.”
IGN - 7.4: “We wouldn’t go as far as to say this is Nintendo-made shovelware, but there's very little that has changed in the 3 years between Mario Superstar Baseball on GCN, and Mario Super Sluggers on Wii. You've got a few new characters in the mix, a few new mini- video games, Mii support for on-field play, and an interesting IR-based item shooting system.”
GamesRadar - 8: “Away from the madness of the team selection, it is as solid a video game as you’d expect from any sports title with Mario’s name attached. There’s a Challenge mode where you are forced to pick from certain characters – which is also how you unlock some of the hidden horrors on the roster – and a decent variety of playin fields that come with their own unique hazards and occasionally bizarre obstructions.”
1UP - B: “Between the creative fields, chemistry boosts, and supermoves, any given contest has a lot going on, delivering a hectic but entertaining experience. As a result, balance isn't the video game's strongest suit, and besides some significant stat differences, some characters have supermoves that essentially guarantee hits (like Daisy's field of sleep-inducing flowers), while others can be handled easily enough (like Bowser's fireball line drives). But the A.I. proves far more criminal when it comes to baserunning.”
So, going by the reviews Mario Super Sluggers looks to be a solid outing at the ballpark. There seems to be some balance issues that all of the sites mentioned in their reviews. Most of those problems referring to baserunning.
I played the video game firsthand at a friend's and I was pretty disappointed in the title. The controls weren't as fresh and intuitive as I was hoping for, and the gameplay was just way too out there for me. I sadly won't be making a purchase, but don't let me deter you from buying because I'm a hardcore baseball sim guy.
The next roundup looks to be Tiger Woods All Play 09, which has already received a 8.3 by IGN. I've been keeping up with this title for awhile now, as EA seems to be hyping this video game up more than the Xbox 360/PS3 versions. With a whole separate dev team dedicated to the Wii version of Tiger Woods, it's all looking good.