I wasn't sure what to expect with this one. The DS' 3D (that is, polygon graphics) can be pretty lame, but thankfully when I began a quick match of tennis the court and characters were recognizable and of good graphic quality.
The selection of characters is pretty nice, about what you'd expect from the cover (lots of Sonic, also some neat other folks).
You can play a randomized quick match, set up a singles\doubles match yourself, do tournaments, or do neat challenges on the different stages. (My copy was used and came with all the challenges already done, unfortunately.) These challenges are basic but numerous, and somewhat entertaining although they might get old.
I admittedly haven't tried any others, but for a DS tennis title this game seems pretty good, worth what I paid.
Length of ownership: 1 week
yes: I recommend this product