Layer Estimates:

Layer: ArcGIS_Building_Collection_Upload (ID:0)
Count: 4100
Extent:

XMin: -13858982.9525
YMin: 4306406.1774
XMax: -9333819.8161
YMax: 5811105.282
Spatial Reference: 102100 (3857)

Layer: Review (ID:1)
Count: 122