Just put these on my 2009 DL650 yesterday.
Mostly the install went fine - similar problems to what others encountered. I had to use a 12" lever on the OEM bolts for removal - and still have to stand on them with almost all my body weight to break the thread-locker.
The Motech bars were straightforward to install. I used thread locker, but also found that the supplied bolts are soft - getting them anywhere near the specified torque started to round out the bolts (and my allen wrench head was in perfect condition and good materials).
I also had issues with the connector (that secures the 2 bars to each other) being difficult. One side accepted the crash bar pipe easily, the other side didn't. Took a fair amount of prying to spread it wide enough for both bars, and even then it torqued the 2nd bar so that the bolt holes didn't line up perfectly. But with a little prying, they lined up.
Once in place - it all seemed snug and solid. Took it for a test ride today around town (nothing about 40mph), and didn't notice any vibration. Happy purchase.