Lots of good pros and cons on the Elemnt and Bolt computers from JohnJ80 and unterhausen. I use navigation on my Bolt on charity rides and group rides where I'm not familiar with the area. If route maps are available, I'll download them and use them throughout the ride. This is just me, but if I'm not familiar with the area and my Bolt will tell me when and where to turn, I really don't care to see or know the names of the streets between my location and the next turn. To me, it just clutters up the screen. I've used the navigation on my Bolt for countless number of rides and it has yet to get me lost or had me make an incorrect turn. This is just my opinion and I know that there are some people that like to have their bike computer maps look like maps on their cell phones, but that's what my cell phone is for.
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HCFR Cycling Team
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2017 Colnago C-RS
2012 Colnago Ace
2010 Giant Cypress