Impersonalism is only a solace for the frustrated. When we are frustrated by the relative personalism of this material world, we try to find out, in material way, the opposite number. Just like a patient who is suffering in diseased condition tries to find out something opposite number. So this is a long course explanation, but actually impersonalism cannot give us the answer to our eternal search after peace. So far we are convinced from the Vedic literatures, God is a Person exactly like you are a person, I am a person, but His personality is very great, full with six opulences, and none of the living entities beginning from the highest like Lord Brahma down to the ant, nobody can be on the equal level with God. These things are all explained in our books, and I would request you to read these books especially the recently published Isopanisad.
There are many impersonalists within our experience who renounced this world to merge into the impersonal existence, but being baffled there they come down again to the material world to find out engagement as altruist, philanthropist, communist, etc.. So there is no stand on impersonalism, but there is steady stand in Bhakti cult because in this cult God is there, the devotee is there and the devotional service activities are there, and when they are joined together that makes us able to stand on the Absolute platform.