The Z4's two seats have longer, adjustable seats, with longer cushions than those that are used in other roadsters, but taller drivers will have issues with the low windshield header, which can make seeing traffic lights difficult and invite a hunched-forward driving position. That said, the seats themselves are supportive enough for long trips.
What the 2011 Z4 lacks in interior space, it makes up for in storage; there's a small cargo shelf behind the seats, a low cargo net to trap objects nearby, and a center console tray, as well as clamshell door pockets. A cold-weather package adds seatback netting, luggage straps, and a storage box at the bulkhead. And you're best to pack for that weekend trip with smaller bags; the trunk space is big enough for a couple of carry-on suitcases, plus a camera bag or several duffels.
Aside from a sharp edge or two, the 2011 Z4 is nicely trimmed in aluminum, ash, leather, and metallic-painted plastic, with an extended-leather option that hides the dash, door caps, and visors. The standard leather seats even get Sun Reflective Technology, which helps keep them from being so scorching on hot days. Assembly quality and finish on TheCarConnection.com's test vehicles are high, and the Z4 has low wind buffeting with the top down and windows raised. With the top up, you can carry on a quiet conversation at 80 mph—which wasn't possible in the previous Z4.