Document your test results. Do not rely on memory. Take note of: what you tested, when you tested (time of day), what worked and what did not. At the end of the trial you want data, not a general impression.
Worth comparing how different services handle stream dropout and reconnection. A good service will resume within 1-2 seconds. A poor one will hang on a black screen for 10-15 seconds or require a manual channel change and back. The reconnection behavior tells you about their CDN reliability as...