in my experience the company itself is overrated specially their customer service, i've already sent some feedbacks to them about the their customer services and they it seems do care.
their BB is one of the best behavior blockers in the market i believe. it is as strong as SONAR DeepGuard might be better in some cases, Anti Phishing is very good and reliable. the ram usage is about 300-400 mb which is normal IMO i don't really care about ram usage etc..
recently i had an infected with Emsisoft on my system but that was my own fault, i did turned off the real time protection in Shadow Defender to test the BB against a sample called MEMZ or Nyan Cat and it failed. i had to reinstall windows cause i could not boot, i've tried Kaspersky Rescue disk to repair or disinfect but it could not disinfect it i don't know why maybe infection was too deep so yep i had to reinstall, i've already opened a case about it and they are on it and they are promissing