Now we're into the thick of pre-season testing, it's clear the Formula 1 cars of 2017 are much faster than before - which comes as no surprise, because the new regulations were brought in to do exactly that.
But many other questions remain. How will these larger and more aerodynamically advanced machines fare in a Grand Prix? Will Mercedes remain the dominant force? Can the cars follow one another closely? Will Fernando Alonso stay calm in a McLaren-Honda team that's clearly still very troubled?
As pre-season testing enters its final days, we evaluate the field and offer some answers.
Can anything stop the might of Mercedes? The team remains the one to beat at testing in Barcelona and it has run a largely trouble-free programme, with both drivers, Lewis Hamilton and Valtteri Bottas, racking up hundreds of miles.
Admittedly, Ferrari seems to have closed the gap with Sebastian Vettel in particular looking like he could give the Silver Arrows a challenge at the opening round in Australia. But perhaps the most significant story here is that new signing Bottas is proving to be very, very fast.
The Finn's early confidence has translated into raw pace, and he even set a new benchmark lap time of 1min 19.310sec on day two of the final test week at the Circuit de Barcelona-Catalunya (video above). Lewis Hamilton looks supremely confident, but early signs suggest these two might have a closer fight on their hand than many had expected.