1. Introduction
2. Artificial Star Analysis Procedure for Diffuse Background Completeness
3. Diffuse Background Completeness Results
3.1. GLIMPSE I, II, 3D Point Source Catalog (and Vela-Carina)
3.2. GLIMPSE I, II, 3D Point Source Archive
3.3. GLIMPSE 360 & Deep GLIMPSE
4. Role of Structured Backgrounds
5. Analysis of Point Source Completeness
5.1. Limiting magnitude of GLIMPSE data products: diffuse background versus point source confusion
6. Conclusions