I always believe the best equipment you can ever carry in any investigation is your own 'Healthy Mind'. What equipments work for anyone, we do not know and we do not recommend. We are trying to get the reality to the world with what ever it takes and where ever it takes us. Some equipments never work for me, but heck, a few which never worked for others has done wonders for me. But does it mean we shared an ego about something? We only share healthy and assertive ego that adds to the pile of paranormal research not subtracts anything.