BriskVM - worth the cash?

A good introduction for integrating Lua with C++ can be found on GameDev.net. The implementation part with C++ can be skipped, lua.mod does that for you. But how to use it can be found later on in the tutorial. It can be easily translated to BlitzMax (check out this post http://www.blitzmax.com/Community/posts.php?topic=79806#897271 for an example)

I don't know if Lua can be used with BlitzPlus. Is BlitzPlus modular?