I use the Compact L1 for those occasion when the larger L1s are more effort than necessary: In order of frequency of use.
-- temporary audio in a medium-size conference room / social hall (seating 40-60 people) ... both for voice (mic) and audio from a video source (e.g. computer, DVD). Usually without T1.
-- as a portable PA for moderate outdoor gatherings (40 - 200 people). (Usually without T1)
-- as a keyboard amp (e.g. on the top deck of a parking garage for a sunrise worship service), or as acoustic guitar (w/ pickup) amp (with mic for vocal); usually WITH T1.
-- sound for a wedding ceremony (not reception). The most recent was a planned outdoor wedding: played pre-ceremony music from laptop playlist as the guest gathered in a ~1/4 acre lawn. It started to rain -- just before the processional. Grabbed everything (with help from 3 others) and hustled indoors to the reception area (same site), set it up (with a mic on a stand pointed vertically at about waist height between where the bride, groom, and officiant stood), played processional, let everyone hear the vows, and played recessional. (Then "yield the floor" to the previously set up DJ for the reception ... packed up the Compact, mic, & cables in 2 minutes.) Usually with T1.