In good conditions I've seen two-wheel drive vehicles up to just past the radio towers. Past that the road to the shelter is much more rugged and airy.

Wife Amy, just before she called it quits at ~12,300. This is her personal best. Views from the top afforded spectacular vistas of the Arkansas River Valley and the valley up towards St. Elmo.

The day after Princeton, we took the Xterra up over Tincup Pass and the day after that we hiked into Chasm Lake. The views from Chasm View are very similar to those from the lower Saddle in the Tetons.