Pen Boutique Ltd review for Hulk Bundles Quantity Breaks

I have used this app to apply volume discount on sets of filter but product count vary every now and then showing non-reliable or inaccurate filtered products. Like I have tried using the same filter selecting any two conditions at every trigger of apply button Product Type: Refills Product Type: Refills - Ink Cartridges Initially, the app showed 884 matching items and then 128, 242, 264,etc. Note: None of the product is added/deleted from Shopify while executing such operation so that it results abruptly. Another note for the app developer is that they should revise its fetching codec or please fix such kind of issues that creates a non-reliable output every now and then. Neither it shows dynamic nature of fetching nor static one but an irregular output which means an exception of the code that bridges in retrieving the output within a timeframe, etc. For CUSTOMERs, If the output is fetched correctly then only we can rely on this app to ease work in just few minutes to handle bulk product. But, the factor is RELIABLE OUTPUT which is MISSING!!!! ***********************************sad-to-say************************************