Allen is one of the most reputed institute in India who are producing a lot of IIT-ians and NIT-ians every year. So if you can follow the classes and if you are regular with your studies, then you will be able to crack the JEE MAINS examination.

For JEE MAINS you need to practice a lot and the Allen practice sets and the mock test are really good. The teachers are overall consistent and you will get good education from the institute that's for sure.

For JEE MAINS preparation tips, visit the link below:

https://engineering.careers360.com/articles/jee-main-preparation-tips

I hope this answer helps. All the very best for your future endeavors!