[amibroker] Jurik Research tools - opinions?

[Michael]

Jurik Research has variations of moving averages, RSI, Stochastics, etc. in 
their indicator toolbox for Amibroker. They are JMA, VEL, CFB, RSX, and DMX.

Any good? Worthwhile add-on purchases? 

Any indicator/s better than the others?

Thanks!