Is there a numerical overview over your XP progression?

Solution 1:

In Borderlands 2, it is possible to view your experience in 2 places. The first is the large EXP bar that is at the very bottom of the HUD:

EXP Bar

The other place to view your experience, and also the only place that will display the exact numerical amount, is on the left-most menu page, shown here:

Missions page displaying EXP value

The experience is represented as:

Total Experience Earned / Total Experience to Next Level

Solution 2:

Its under the My Missions tab, at the bottom. See this screenshot:

Xp amount