I haven't used the cupholders yet, but I did test fit a cup. The spring loaded arm is higher than the stock cupholder and should do a much better job than the flaccid flap in the stock cupholder. The '03+ are more similar to the pre'95 Aero cupholders I have in both The Ice Car and The Scab. Those pre'95 aero cupholders work well so I think the '03+ should also be a good upgrade. I'll find out next week on our trip.
A couple of pics for comparison. The transition line on that McD cup makes for a great reference point to compare just how shallow the stock cupholders are.
New:
Stock:
The flaccid flaps on the stock unit do absolutely nothing and the cup really just sits in the far too shallow and too wide hole without actually being held.
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