Daniel Ricciardo may not have completed "a whole lot of laps" on day one at Jerez, but the Australian was pretty impressed with the new Red Bull.
The Milton Keynes squad took the covers off their RB11 before the start of the first pre-season test on Sunday morning and surprised the paddock with a barcoded – or is it a zebrull? – livery, which Ricciardo described as "cool".
The 25-year-old went on to complete 35 laps and was fourth fastest on a day that saw his former team-mate Sebastian Vettel top the timesheets for Ferrari with a 1:22.620.
However, Ricciardo was still just 0.718s off Vettel's pace and was generally satisfied with how things went.
"We got going pretty well this morning and I got a few laps under my belt," he said. "So the first impressions are good. We'll get a few more laps over the next few days, but so far everything seems pretty encouraging. I can feel a step forward. I won’t go into too much detail but it's there.
"We didn't do a whole lot of laps but definitely more than at this test last year! In general everything is behaving as it should. Obviously we had a couple of issues, but once the car is running it's all going pretty normally. A good first day, there are some positive signs there."
Head of Race Engineering Guillaume Rocquelin added: "It's no exaggeration to say that today represented a good day for the team and for the RB11. The car preparation has been good, the day's running was by and large excellent and we've already gathered a lot of information.
"The day generally went according to plan, starting cautiously, building up the length of the runs and learning all the time. We had a small issue with the brake controls system around lunchtime but you're always going to have little niggles like that on days like this.
"We stopped running late in the afternoon with a technical issue, but it wasn't too serious. An alarm went off on the engine and at that stage of the day, knowing that an investigation would take time we chose to stop. Aside from that, everything went pretty as we hoped."