I got this pack in a bundle a while back, if I hadn't I probably wouldn't have found it (at least not as easily). The pack has the best selection of icons I've seen in any item icons pack ever. This sounds like hyperbole but the variety of icons is astounding when compared to other packs. Other packs I've perused usually have about twenty to fifty icons and then just recolour them to bloat the advertisable number of icons to a thousand or something, meanwhile HAS has different icons for nearly every variant it contains. There are a few that are just recoloured but lots of the time they also have different patterns or things added or removed, hardly noticeable compared to its ilk. As a pixel artist myself I know how hard it is to do a tonne of icons but even still Aleksandr Makarov/Kroll/Rabbit has done superbly, in his other packs I've checked out too!
I couldn't suggest or commend this pack enough. It goes above and beyond anything else I've seen, only lacking in one or two areas that can easily be ignored or filled in from elsewhere. I have been using the pack as both placeholders and just as the assets for some projects, and with a Recettear clone in particular this pack excels (only really needing material icons to be gotten elsewhere). Technically the pack has been updated since I first got it as I only found out a few days ago that a 1.2 update of sorts had been uploaded, so while that update came out two years ago, the pack has gotten updates before so Rabbit at least doesn't leave packs alone if they need some updates or additions.
Ramble done with; pick up HAS if you have need for pixel art item icons, I couldn't suggest it enough. Also, support Rabbit elsewhere, he deserves it (esp considering recent events ;-v-). Anywho, danke schon Rabbit! I can't wait to get my hands on other packs and in general see what you get up to!
TL;DR pack is good, use good, much yes.