Never an issues (thus far), always smooth. But I should make something clear.
As an Indiamart vendor, especially as "wholesaler" with rock bottom pricing, it's not the same as a "retail" vendor like PCT24x7. If there's a seizure, you're not getting a free reship (like most Indiamart vendors). There's no comprehensive catalog, you need to know what you want and supply a list for quote. If the quantity of a single med isn't very high, the discount won't be either.
If you want a straightforward transaction. guaranteed delivery (ie free reships), dabble in a few strips of this and that, PCT24 is the way to go. You never have to be concerned about touchdown.
This by contrast, is the place to use when you're looking to stock up on multi year supplies of essentials. Not to suggest customer service is bad, it's very good actually. They always send pre shipment pics of every box and its contents for instance, avoiding possible errors. But you must accept seizure risk, in exchange for very significant savings. I'd say it's for advanced buyers only.