I've got a Lamson Guru 3.5 for my Sage Z-Axis 7 wt switch rod. Excellent reel. The only problem I've had with it (I believe this to be common with Lamson reels) is one time the "gland cap" that covers the shaft that houses the clutch got unscrewed and my spool fell off while fighting a fish. It's hard to explain, but if you download a diagram of the guru you'll see where the gland cap screws into the reel's drag cylinder that houses the clutch. When the incident happened, this left the clutch unguarded and exposed - and luckily it didn't just fall out into the river. This was the Squamish and the water had some colour so I would have likely lost the small clutch if it fell out. Once I discovered the problem, I was able to remove the gland cap from the reel spool and re-screw it back into the drag cylinder and was back fishing again. The crazy thing is that the exact same thing happened to my buddy (Stratocaster) that same day with his Lamson Konic!
I reported the incident to Waterworks and they denied this being a problem. However, they sent me a new gland cap that I noticed was modified from my original one. Anyway, the lesson here is that I always check to ensure the gland cap is screwed in tightly by hand pressure before I use that reel, and I've never had that problem again.
Other than that, it's an excellent reel. I also obtained a Hardy Marquis Salmon 1 for my switch rod, but I actually prefer using my Guru for it's functionality and efficiency when pursing salmon. The Hardy Marquis will be reserved for Steelheading.