I took the Lalumha falls or Manoa falls hike & Kailua / Lanikai beach day tour with Seamus as my guide. The group was nice and small - only me, Seamus, and a couple from CA. Seamus was a very knowledgeable guide - very approachable and fun to hang out with. He knew the trail very well and carefully guided us over the more slippery areas. One should definitely be prepared to get muddy and wet on this tour - I actually felt relieved that it was raining because there are lots of changes in the terrain and sunny/hot weather may have been too much. Seamus will say the trail is okay for children and elderly, but I don't believe it is. Might be a pain. I wanted to get a little rugged this trip, so it was perfect for me. The waterfall at the end was gorgeous - Seamus didn't rush us at all.
We were unable to do the beach due to the weather, but Seamus took us around the island and showed us turtle beach, which was lovely because we got to see multiple sea turtles! We stopped at a local woodworker's shop for gifts which was a nice touch - always prefer the mom and pop places to the cheap junk you get in touristy shops. Pickup and drop-off were seamless. Easily one of my highlights this trip and have already recommended to a friend who will be in the area soon. Thanks Seamus!