Lighthaus Camera: Your opinion, mirrorless systems?

In the 10 months that I've been with Lighthaus Camera, I've only experienced two customers who purchased a mirrorless system: a Sony A7 and the Olympus OM-D EM1. My question to you is: what do you think of mirrorless systems? Would you trade in your DSLR for one of the beauties in this post? If you have a mirrorless camera, what are your likes and dislikes?

The cameras pictured are as follows: the Fuji X-T1, the Nikon 1 V3, the Olympus OMD-EM1, the Pentax Q7, the Sony A7 and A7R. 

Lighthaus Camera has four locations across the Hawaiian islands to serve your photographic needs. Should you want to order one of these cameras, feel free to give us a call.