Will Mercedes remain on top? Will the Renault-engined teams start to look more convincing? Can Ferrari pull off a surprise? Who has won the testing war?
Formula 1's 12 days of pre-season testing are now over and with the Bahrain double-header complete, the next time the cars run in anger will be when they roll out of the garage for free practice at the Australian Grand Prix.
With just 11 days to go before that, we now have as much information on how the competitive order will shake out as we ever will. Here are 10 things we learned from F1's final winter test in the island kingdom of Bahrain.
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Edd Straw is Editor-in-Chief of Autosport, overseeing both print and digital versions of the brand. Edd has worked for Autosport since joining as a junior reporter in 2002. He became Editor in November 2014, having previously worked as National Editor, News Editor and Grand Prix Editor.
Originally from Guernsey in the Channel Islands, he joined Autosport shortly after graduating from university. He went on to cover a wide range of categories from club motorsport to the World Touring Car Championship and Le Mans to Formula 3 before switching to F1 full-time at the 2008 French Grand Prix. He continues to cover a range of international events in his position as Editor-in-Chief.
In his spare time, he was formerly a club racer whose abilities did not match his enthusiasm in a variety of categories.
Glenn Freeman is the editor of Autosport.com. After 10 years of karting, he decided that writing about motorsport would put less strain on his dad's bank balance than competing, and after obtaining his NCTJ qualifications in newspaper journalism, he joined Motorsport News in 2005.
As deputy racing editor, he covered British Formula 3 and selected international events. He also got the chance to take on boyhood hero Nigel Mansell in a kart race and beat the 1992 world champion.
Glenn left MN to become Autosport.com's international editor in September 2006 and joined the magazine's news desk in January 2008, spending six years as news editor. During that time he covered four seasons of DTM and a year of GP2/GP3, before switching to Formula Renault 3.5 from 2012-14. He became the website's editor in 2014.
Ben Anderson is Autosport's Grand Prix Editor and one of our track testers. He holds an undergraduate degree in journalism studies from the University of Sheffield and joined the title in March of 2008, after eight months working in local newspaper journalism for award-winning weekly the Surrey Mirror. He has raced karts and cars since the age of 11, and occasionally continues to do so around his reporting commitments for Autosport.@BenAndersonAuto More features by Ben Anderson