Finally got it, I fuckin had to buy seperately the M+ and GST since the bundles weren't out here in Italy, some made their way in some cities but are really really scarce.
My "I'm a former circuit's tennis player" 
lol )
impressions of GST With Motion Plus:
First of all, thanks a lot to all of you guys, especially
markatisu.
If it wasn't thanks to the posts I've read here on how to "tame" M+ on GST and how to play the game I could see easily how some occasional player could just ditch the game after half an hour and label the controls (and thus, sadly, M+) as completely broken.
Not including a video tutorial was a criminal mistake on EA's part and Nintendo took it too lightly to leave it to EA to promote the add-on and it's early success just with their games: even that one video released with John Singleton (producer) playing with M+ would have done a whole lot of difference on how to move and hold the remote correctly, not to mention to give the newbs a tangible example on how it deeply differs playing with M+.
The first half an hour I went straight to do the "create a player" option and started a quick match against Becker, using just the Wii remote with M+.
The controls were all over the place, sometimes the player would sweep the racket without me giving the imput, and even if it indeed recognised top-spins and such, the ball took some strange effects and was rarely inside the court's playing area: Most infuriating was seeing the player very often standing in the way of the ball, hitting straights back-handed instead of right-handed and such.
I was really really disappointed, but not even close to give up because I had read this thread carefully before buying the game.
So I went back to the game open minded, and this time began with the practice court, choosing John McEnroe. I slowly learnt my way to how to properly play the game and it took me 30 good minutes of practice to grasp the way this advanced controls worked. Now, after just six hours of playing, I have no problem leaving Roddick, Becker, Serena and many others at 0 games, hitting the ball how I want, how fast I want and wherever I want. It's fucking AWESOME.
It's really REALLY rare for me to have an opinion on a game change
that much.
my Little TIPS for Motion Plus Controls:
Whenever I can and it's no impediment, aftert I take a shot I stand with the remote steady in neutral position (pointing at the TV with the D-Pad facing *UP*), that way the M+ will NEVER EVER "go crazy".
Using the nunchuck changed everything for me, even if I am now a better player also without it, but really with the nuchuck combo I never have any problem facing and hitting the right direction: to help this matter, like you would playing real tennis, when the opponent hits the ball you should open your arm in the direction the ball is going to land (left ot right) and you feel it's correct (back-hand or straight) when anticipating a serve's response; if you take notice you'll see that your player too is switching the racket between your left or right sides, only THEN you should take your shot.
After having taken the shot, just go back with the controller at the centre of your body, possibly facing the TV with the D-pad looking up. 2 seconds staying still are enough for the motion plus to recalibrate perfectly. It's not actually needed every time you take a shot, but it's really second nature for me now and since it doesn't bother me in the slightest I do it anyway.
Threat the remote as the racket's handle!
That means that when you're hitting a top-spin, the semi-circle movement will have you hitting mid-air a "virtual" ball with the B button of the remote going towards the TV and facing it by 3/4 (so the remote itself is laying horizontally just by 3/4 when you swing and not perfectly flat)! Hopefully I made myself clear.
So there, hopefully it'll help someone graspin' the controls better.
Conclusions:
In the end, as a gamer enthusiast and former circuit tennis player I am amazed by M+ and it really is everything I've ever wanted the Wii to be, and it makes me smile that this is just the first game to use it so good times are coming as devs learn to do better with it.
But, while I could never see myself going back to M+ less controls now, my gf, a Mario-Kart/Wii Sports/and such crazy-fan, couldn't really enjoy the new controls nor had the patience/skills to learn them for more than the 20 minutes it gave to the game, and so she was more than happy to go back to the basic Wii remote controls and just leave it at that... and she's loving GST now.
GST with M+ controls is NOT for everyone, maybe the next iteration will change that, but for now it's not something I could recommend to my non-gaming friends.
As much as I hate the word I'd say that it's the "hardcore" version of Wii's motion controls.
That is good for me, at least for this game, maybe not so much for others... but at least there's time to improve on that and Sports Resorts is just around the corner.
