FIrst cold start in about 10 minutes. Restart after half a day is a few minutes, depending on sky visibility. Warm start is under a minute. The times seem comparable to other devices I have: Holux GPSSlim 240 (bluetooth, SIRF III) and my old Garmin iQue. Sensitivity inside buildings is closer to the one of the Holux (good: SIRF III), than the one of the Garmin (poor: older chipset).