i had a mio 505 HC for around 5 weeks after wanting to upgrade from a basic computer .... If i'm honest i had nothing but problems with it ... first time use seemed good with loads of spec and info when riding ... I found the screen not bright enough even at full brightness in the day . The gps with the maps always showed me being off my route... I contacted mio and they said i need an update on the software ..... This wasn't going to happen ,as i use Apple OS and mio at the time wasn't compatible which i wasn't told when i brought it . Mio said they are working on it ,but didn't know when it was going to be ..
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I do some sportives and used it on my first epic 100 of the year to the unit run out of power and shut off before finishing ... This also meant it didn't save my info as well as leave me without any ride info for the last 15 miles ...
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i contacted mio again and they agreed i could return for a full refund with a ref code .....
Got a garmin edge 510 team now and i've been very pleased with it overall .