Ben & Rachel are the owners and I was in contact with Rachel before heading to Lanzarote via several emails. I was collected each morning from my hotel by a member of staff and was offered to be returned after each day was completed. I was accommodated to be able to dive early morning and mid morning on my selected 3 days. This left me with plenty of time to fulfill other holiday obligations during the day. I dived with Joe who is a 
Dive-master on my first two dives. A true gentleman with a great diving etiquette and knowledge of the area. We started out with a 20M+ dive and then a relaxing 18M dive mid morning. I have no doubt he will be an excellent instructor !! 
I dived with Dave who is also a Dive-master on my second day. Sea horses - barracuda &
a large stingray were all to be seen as we headed towards the Blue Hole. 30M+ here in pristine conditions. Dave is another great addition to Manta. His calm and quiet demeanor along with his excellent diving skills were to be seen on dive number 2 when we were accompanied by a large number of newly qualified divers. Both Joe & Dave could not do enough for me and I dictated the pace of the dives. On day 3 I met up with other divers and we did our own thing for the morning. It is a busy dive center at times with Discover scuba & Open Water students about the place along with veteran divers but don't let that worry you. You are in good safe hands here. See ye soon folks.

MJHenson, http://www.tripadvisor.co.uk/ShowUserReviews-g662290-d1382723-r229914064-Manta_Diving_Lanzarote-Puerto_Del_Carmen_Lanzarote_Canary_Islands.html#REVIEWS