Nintendo's Wiimote controller has been at the heart of the revolution that the firm has driven through the video-gaming world, and it's thus unsurprising that there's plenty of interest in its Wii MotionPlus enhancement.

It's effectively a jacket with a connector, into which you slip your existing Wiimote, thus extending the size of the controller. The thinking here is that it gives more precision to your movements, thus addressing one of the criticisms that the control system sometimes attracts.

To help encourage take up of the new accessory, which costs £25 without online discount by itself, EA Sports has bundled its new tennis game, Grand Slam Tennis, in with the Wii MotionPlus, in a £50 pack. And we didn't expect to be saying this, but it might just be worth the money.

First, the controller. You get a few sheets of instructions in with it, but it's a doddle to fit. The hardest part is stretching the jacket that's part and parcel of the add-on to fit your Wiimote. And that really isn't tricky at all. If the process takes you more than five minutes, then we can only conclude that you had to take a phone call half-way through.

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Once sorted we popped the game in the Wii, which insisted on performing a system update to play it. Then we got some opening graphics that filled us with little hope at all, highlighting the comparable graphical weakness of the Wii with some force. But eventually we got to the game proper, and here's where things picked up enormously.

The Wii has a few tennis games to its name already, most prominently Sega's recently-released Virtua Tennis 2009. But Grand Slam Tennis is arguably the finest. Allowing you to indulge in one-off matches, party games or a grand slam mode that allows you to make a player and then try to lead them to tennis glory, the game takes some time to get to grips with but proves worthy of the effort.

The key to its success, and the fact that it hangs together so well, is the control system. While there are rough edges to the precision that the Wii MotionPlus offers, you do at least get the chance to apply slice, flat, lob and drop shots, for example, with a degree of confidence.

You can, incidentally, play the game with the normal Wiimote, but that makes it little more than a timing exercise. Conversely, if you want even more control over the action, you're best off attaching a Nunchuk controller as well.

Accepting that the game isn't perfect, and tweaks to a future edition would be welcome, it is enormously good fun. The rallies can be exhausting at times, and you occasionally feel a little cheated by the controller, but practice really helps here and Grand Slam Tennis rewards the time that you put into it.

Sure, it might look a little rudimentary, but the execution of the shots and the flow of the play is much better than we first gave it credit for. And when you learn how to play a killer shot, it's genuinely satisfying. You're matched toe-to-toe by the increasingly challenging AI opponents and it's a testing game to battle.

Furthermore, there's a lot to actually do; with various tournaments to win, the minigames to battle through, and even a crude attempt to take on Wii Fit bundled in there too, you're certainly getting your money's worth.

And while the jury may, to a degree, still be out on the controller, EA's brand new tennis franchise is one very much worth keeping an eye on. For the Wii MotionPlus itself, though, Nintendo's own upcoming Wii Sports Resort is surely the acid test.

A surprisingly strong tennis game and an interesting evolution of the Wii controller too. A bit of a result all round.