Child Safety Seat Ease of Use Ratings


Are All Seats Safe?
All car seats rated by NHTSA meet Federal Safety Standards & strict crash performance standards. While all rated seats are safe, they do differ in their ease of use in four basic catagories:


Evaluation of Instructions

Vehicle Installation Features

Evaluation of Labels

Securing the Child


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Diono Rainier (RF)



Manufacturer  /  Model NameDiono Rainier
Model Number  /  Manufacture DateUS30300  /  Apr 1, 2014
Harness Type5-pt
Weight  /  Height5lb - 50lb / up to 44"
Evaluation of Labels 2 stars
There is no complete illustration of a properly restrained child next to the sizing information on the labels. No supplemental sizing information is given on the labels. Guidance for selecting the correct harness slot is not given. Labels do not explain the use of LATCH attachments.
Evaluation of Instructions 2 stars
The manual storage location may not be obvious, and some may find it difficult to use. No full picture exists of a properly restrained child next to sizing information in the owner's manual. Supplemental sizing information is not given in the manual. Methods of installation for this mode of use are not depicted and labeled in full. The section describing vehicle seat belt types is incomplete and may be missing information. The user may need to read text in the manual to route the seat belt or to use the lower attachments. Minimum child weight information is not given in the manual.
Securing the Child 2 stars
The restraint did not arrive fully assembled for the youngest occupant. There is a head hugger or body pillow blocking the harness slots in the shell from being easily visible. The harness must be rethreaded to adjust height for the child's growth as well as for reassembly after cleaning. While disassembling for cleaning, mandatory pieces may become loose and could be misplaced. There are no illustrations on the child restraint showing how to convert this restraint to this mode of use. The LATCH belt must be rerouted to convert the restraint to this mode of use from another mode. The harness must be reinstalled into the restraint to convert to this mode of use from booster mode.
Installation Features 3 stars
It may be uncomfortable for larger hands to route the seat belt or LATCH belt through the belt path. There is no guidance on the seat regarding the proper installation angle for recline when used in this mode. There are less than three levels of built-in recline available. LATCH attachments have buttons to depress for removal.
Overall Ease of Use Rating 2 stars

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