I installed a pair on my 09 wrr. Pretty slick having integrated blinkers, for sure...and the blinkers seem pretty tough as I had a few spills in the bush with no issue...the actual blinker parts don't really get the brunt of typical tip-overs/spills. Don't know many other options for integrated blinkers (besides HDB $$), so options are limited AFAIK.
My only beef with the Zeta XC w/blinker handguards is they are not quite as solid as others I've had (like Cycra Probends). The bracing/bracket (that attaches closer to the center of the handlebars) has a few extra swiveling parts that sort of weaken the overall strength. I had those cinched very tight, yet they would still twist up/down/out of position from minor falls.
Some may argue to quit pissing around and just go for the HDB and be done with it...but that's a $ issue.