Need explanation for paramters get_product_list

Trying to integrate the API into Woo Commerce and need help with explanation of few parameters.

Here is the reference link:http://www.bakingcode.org/print_io/?function=6&submit=Submit

All questions w.r.t to get_product_list call:

1) What is the significance of below parameters.Why they do return as empty? [IsFeatured] => [IsComingSoon] =>

2) Is MAXZOOM indicating that on frontend.Does this mean in CSS i can scale to only 150% [MaxZoom] => 1.5 zoom:150%

3) Is MAXZOOM indicating that on frontend.Does this mean in CSS i can scale to only 150%

4) How is [PriceInfo] different from [RetailPrice] object?

5) For [info] array element [0] does not have a key .Is it a bug?

                [Info] => Array
                    (
                        [0] => stdClass Object
                            (
                                [Content] => Array
                                    (
                                        [0] => Are you looking for an imaginative way to display a beautiful image without putting holes in the wall or buying additional hardware? These long-lasting, sturdy acrylic blocks can stand up anywhere; no wall required.  In addition, the 3D aspect ads artistic, visual interest to any room. Make your most treasured moments timeless.
                                    )

                                [ContentType] => Text
                                [Index] => 3
                            )

                        [1] => stdClass Object
                            (
                                [Content] => Array
                                    (
                                        [0] => 4x6", 5x5", 5x7", 6x6", 8x8"
                                    )

                                [ContentType] => List
                                [Key] => Sizes
                                [Index] => 4
                            )

printdotio / printio-api

Need explanation for paramters get_product_list #23