First let me say that I would have given 4 1/2 stars if available but it is definitely better than 4 stars.
Be warned! Using Motion+ takes time to get used to and has, in my opinion, led to some lower ratings on other sites than the game deserves.
Many of you will have seen the demo video where the EA guy moves and the player moves with him. I tried this first of all and had to unplug the M+ to convince myself that it was being detected at all. Now that I have had the game a while I realise that my movements were too jerky a la Wii Sports Tennis. The M+ demands that you swing smoothly and take a full swing. It is also important, as in real tennis, to try and get into a neutral position between shots. Standing and admiring your shot in the follow through after a forehand results in the game assuming you now want to play a backhand and vice versa. Returning to the centre position gives you more control.
Once you have mastered, or at least got used to, the controls, the game feels as if you are really playing tennis. The only downside is the use of the A button to lob and the B button to drop shot (I have managed drop shots without the B button though).
Exhibition matches - play against the CPU or a real person at any of the 4 venues. Number of games per set and number of sets is configurable.
Grand Slam - play through the four grand slams (Australian, French, Wimbledon and US) with some warm up games at each event. This is fun but limited. I have not found any way to change the games from 3 per set, one set although you do have to play until you are two games clear which has led to some longer sets. I would have liked to see a full ATP tour or at least some non grand slam venues.
Party games - Only played them as part of the Grand Slam and against the CPU but they are fun games which I am sure would enliven any gathering of family or friends.
Online - I have only played one game but it was fantastic! No lag at all against someone from Spain and win or lose you know it's down to playing ability rather than programming. Unfortunately there is no option to chat with your opponent though.
You can control player movement with the nunchuk but I am no good at it and, once you have mastered the M+, the auto control works quite well.
Serving is a bit weak and is down to timing with limited control, using the D Pad, over direction. I have yet to Ace the CPU.
The graphics may not be to everybody's taste but I think they are in keeping with the Wii while still having real pros identifiable.
Over all I think that EA have produced a polished introduction to the M+ and, as with most EA products, will almost certainly make a better effort with next year's version. The M+ releases the potential of the Wii and brings a new level of realism to sports gaming.