I suspect the best opportunity for you to read about and connect with people that own or have heard the Ascend products with the RAAL are on AVS...here are a couple links...and you can search for more. Needless to say, you will find fans and detractors...much like every other speaker out there.
https://www.avsforum.com/forum/89-speakers/3044988-philharmonic-bmr-v-ascend-sierra-raal-tower.html
https://www.avsforum.com/forum/89-speakers/3075988-raal-tweeters.html
https://www.avsforum.com/forum/89-speakers/2996816-ascend-sierra-2-experience.html
https://www.avsforum.com/forum/89-speakers/3044988-philharmonic-bmr-v-ascend-sierra-raal-tower.html
https://www.avsforum.com/forum/89-speakers/3075988-raal-tweeters.html
https://www.avsforum.com/forum/89-speakers/2996816-ascend-sierra-2-experience.html