Some therapists love the grotto grips and others do not. It just depends on the client and how they respond to it.
Trial and error may be the key to finding the right tool to assist in grasp on writing utensils. Using a finger to gage space between words can be helpful too. The Grotto grip helps clients maintain a tripod grasp.
NOTE: Grotto grips are inexpensive and come in many different colors that are fun and have a nice feel to them.