Alright, I've had some time this week to test out LanderBolt and I think I'm quite disappointed.
Let's first talk about the positives:
the landing pages AND the builder both load extremely fast.
You can import your own landing pages that you've downloaded (you have to copy/paste into the code editor and upload the images one by one. I think this is also a negative because it's not exactly fast.) I was able to get a 'spin the wheel' lander working in there.
You don't have to deal with a server, FTP, etc. You just click 'publish' and your page is ready to go.
Doesn't integrate with AdPlexity Mobile (it seems that it only integrates with the Native version)
The templates pretty much suck... unless you are doing native ads. Most of the templates are for native.
One template is broken. This made me question the platform a little bit, especially because it's not cheap.
Some of the templates encode images with Base64 encoding. Now, I'm not claiming to be an expert programmer or anything, but from my research, the load times are slower than directly linking to the source image. Out of the handful of templates I looked through, I only found one encoding the images like this.
The code editor was a little bit buggy at times. (sometimes I'd have to have my cursor like 4 characters ahead of where I really wanted to type)
Support hasn't replied in 4 days (I know it's the holidays, but still)
Overall Landerbolt seems like it would be fantastic for media buyers focusing solely on Native ads where they just need simple landers (advertorials), but not really for anyone else.
I don't think their pricing comes close to the value they provide (at least for me and my uses).