I wrote my first review on Lumosity in 2011 after 3 years of using their programs. I have read lots of reviews about their billing process and even though, unfortunately, this has probably hurt their reputation a little, I have continued to use their service and I will tell you why.
In 2007 I suffered a serious accident to my neck and lower spine, but it also caused some neurological damage affecting my memory. I lost the ability to recall words and remember information and facts when under pressure. My doctor said I would be in a wheelchair within 5 to 10 years and my psychologist and neuro physician said I would probably have memory loss and impaired neural function for the rest of my life. In 2018 I am walking, I have full use of all my limbs and even though I still suffer from some nerve damage and pain, my brain has repaired itself through using Lumosity's neuroplasticity training program. Please note: I am not an employee, associate or family member of Lumosity, and I have not been paid to endorse or recommend this company. I have had no contact with them in the 10 years I have been a member.
I was a concert musician before the injury, so I was used to practising regimens. I tried quite a few programs before settling on Lumosity. I have followed their schedule and training plan diligently and did extra exercises in the skill areas where I was down in my percentiles. Hard work has DEFINITELY returned good results. I thoroughly recommend this program to anyone suffering from memory loss, cognitive impairment or perhaps has suffered a brain injury, due to an accident. The brain is pretty amazing and can repair itself if exposed to the right conditions which, in my case, has also included nutrition, plenty of water, exercise and regular visits to the GP for monitoring.
http://synapse.org.au/information-services/an-approximate-guide-to-the-recovery-process.aspx
By all means, try the other programs out there but Lumosity is the best for me. I will probably continue to use this for the rest of my life.
This is just a personal opinion.