I own the Artist 15.6 Pro and it's been well around a year with no issues at all. XP-Pen is a well known competitor to Wacom and they are growing both in knowledge and equipment expansion. You will meet people who are one-sided in opinion due to either bad experiences with faulty hardware from failure at production stage or bad shipping treatment (no surprise really).
What you should look for is the general aspects of the company vision behind creating the product in the first place - what do they focus on and what do they wish to obtain by providing you with the purchase?
Wacom has been on the market for years and are mainly aiming for the professionals in the industry, thus their pricing is aiming at a higher tier clientele, so if you can afford that then go ahead (tho you will still cry if you end up unlucky with a faulty product that needs to be replaced anyway).
XP-Pen is a newcomer striving to bring the best balance to the table between pricing, hardware, and software. They aim at both casual and professionals who is just starting out in the industry, thus their execution in price vs hardware is with a less emphasis on high-end materials used during production, while still maintaining a keen eye on a pleasing design and a good pen-to-screen interaction.
So, you really only need to take a moment to go over what your needs are vs your budget available - you won't be able to avoid the chances of getting a faulty product, but in that case you should also reach out to customer service with any issue what-so-ever after having noted down the problems. (cuz, no company will pity you over a sob story with no hard evidence)
I hope that you can use my tips and input (I apologize in advance if my wording seems a bit harsh) and I wish you all the best of luck with your new tablet