Extremely poor system experience

I have my Simplisafe (if you can call it that!) supposedly monitoring my home when I'm not there. Last time it was 10 days armed since I'd been back. 

Walked into the house before disarming.. and the system DID NOT EVEN KNOW I WAS THERE! NOR DID THE MONITORING CENTRE. How bad is that??? 

The alarm showed it was armed and everything was ok. Spoke to support (next to useless) they gave me the standard rhetoric of it must have gone stale etc (well, that's pretty rubbish isn't it? My whole house could have been burgled or burned down and no one was any the wiser). 

They guided me to remove batteries, replace, reboot the system, remove the sensors and add them again, etc... 2hrs it took... only to find that 2 of the motions (there was only 2) had failed? Very suspicious if you ask me.. I get one failing but 2 at exactly the same time? 

Absolutely rubbish system. No faith in this whatsoever. Anyone else had similar?