Last Saturday Jenson Button was ran with upgraded McLaren but he has not done more mileage because hit by hydraulics problems and then rain interrupted in session.
"I'm very happy with the direction we've taken with the car and with the package we have. Button told the Guardian.
"We don't need more bits. We've got it all on the car already. I'm a lot happier with everything compared with last year. We're not running round scratching our heads wondering what we'd done wrong.
"Last year we had problems with the exhaust. We also had the problem that we just weren't very fast, even when the exhaust did work. Maybe that was kept secret. But we just weren't very fast."
The British speedy now positive about new McLaren MP4-27, they claim that new challenger had a good winter in terms of reliability and the car making good progress.
"We've had a good winter in terms of reliability, most of the time, apart from Saturday. And I feel we are making good progress with the car. There's nothing I'm afraid of with the balance of the car. It listens to changes, which is really important with a motor car." Button said.
"It's great that they've brought a big upgrade because it takes everyone's attention off our car.
"They seem to have a very different rear-end system than they had before. But just having different pieces of bodywork doesn’t mean it's a massive chunk of lap time. They'll be quick but we don't know how quickly."
"We're all trying new things at the start of the year. One of us will get it right and I'm sure the others will follow suit in the end. They're obviously on the back foot but I'm sure they'll catch up. They have the resources, they have the expertise and they really want and need a good season in 2012.
"We had such a bad winter last year. Then again we got to the first race and Lewis finished second. So we had a good result. Winter testing is a strange one. We all like a challenge from Ferrari. It's a fantastic team. They've achieved so much."
"Last year was a good year but I didn't need it to make me feel confident in my ability. The first year with a team is always difficult especially when you have spent so many years with another one.
"I was with my previous team for seven years. Initially it was pretty difficult. But I feel that I had a pretty good input into last year's car. It felt like my own and not somebody else's."
"Sebastian Vettel is the favourite because he is the double world champion. But I feel that the field will be bunched up a lot more now. Red Bull won't have the advantage they had out of the blocks last season."
And Jenson Button also expecting challenge with Ferrari on racing track.
"I'm sure Ferrari can find their way out of a sticky situation – if they're in a sticky situation. I don't really know where they are in terms of pace. He added.
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