All of my betta's have the logs and they love them. :) In fact I need to pick one up for my newest addition, but after 3 years and serious scrubbing the past couple of weeks the paint on my own started chipping off. Thats from my scrub brush mostly though. I don't think gentle washes would harm it.
The hammock I have, and it kept falling out of the suction cup it sits in. So I was going to get some aquarium sealant and glue it in, but I noticed the wire on the bottom painted green was rusting at the tip so I chucked it. :)
Also the floating mirrors are fun. After a little while of use the mirror kind had these cracks going through the plastic. So I snipped it off and used the ball for a while, but ended up loosing it. Gives them something fish safe to flare at. :)
I also have the log and Taco loves it! He likes to spend most of his time in there, swimming in and out at times, especially when its sleep time. I have seen the leaf/hammock but not sure how that one would work. It looks interesting though. Oh and about the log, you might have to sand the inside with some sand paper. The one I bought was somewhat rough inside but it smooths out pretty easily.
I'll share some pictures with you later tonight, but I have to leave for work tonight. I have hoods on all my tanks with no problem.
No need to sand it out, just don't scrub it with a brush every other day with super hot water. I've also had that one for 3 years, my others I have no problems with. ;)
I've never used the hammock, but I've seen complaints on here about how the inside of the leaf has metal in it, which corrodes and causes a black gunky thing to ooze out. Not exactly something I want to keep in my tank, you know? I'll see if I can find the thread(s?) I'm thinking about right now, and post them here. :D
I'd love to try the log, but they're so darn expensive. I'm not paying 15 bucks for something I see in the reptile section for $5 (the bamboo tunnels). I'd get a bamboo thing, but I don't want to take a chance and have it gunk in my tank because I'm too much of a numbskull to realize it's rotting.