Customer reviews are actually pretty good. But I think the reviews and your expectancy if you buy a Tilswall is dependent on what you expect for the money. If you're just buying a tilswall to have a little mess around with, detect shallow items on the beach, have some fun digging up old coins at a shallow depth with the kids, then yes, the Tilswall isn't bad for a laugh considering how cheap it is.
Before writing this "review" [it's not really a review] I looked at what reviews were out there for this model, and I couldn't help to notice that there is literally one video review which is basically a promotional slideshow video of images.
But the people who made the video are so clueless, or they think their watchers are, that they actually claim that the Tilswall TST-TCY-P, and I quote, "is one of the best professional metal detector in the market today."
In truth, the Tilswall is a kids metal detector, nowhere near the level of being classed as a professional metal detector. If you want something at least entry-level professional, I would advise you to take a look at the Garrett Ace 250 or the C-Scope CS1MX.
Tilswall is a Chinese company and their business name is Shenzhenshijimiankejiyouxiangongsi. A bit of a mouthful. But credit to them, when it comes good products in terms of value for money / good revews and customer service / support, they do appear to a very good track record.
And for how cheap the Tilswall TST-TCY-P is, it's not too bad to either practice with, or have a mess around with digging for items no deeper than say 4 inches [that's just my own opinion on the average depth capability].
It's also a decent choice for those who want to give metal detector a go for the first time [new hobby tryout for the extra time due to the plandemic] but don't want to jump in head first and spend a pot full of money on a nice pro detector only to end up discovering metal detecting isn't for them and their nice pricey detector ends up sitting in a cupboard for a few years, or ends up for sale on eBay.
Tilswall do state the deepest this metal detector can detect items is 18cm, which is 7-inches. But in my opinion that is a stretch. Of course, sometimes the type of soil, whether its dry / damp, the type of metal buried etc can affect conductivity greatly. But I seriously doubt this detector has the power to find items at 18 cm. The Ace 250 and 1MX certainly can but they are more expensive. However, it's money well spent.
But lets not forget, apparently some of the items found in the Saxon hoard [Staffordshire Hoard] were only 2 - inches deep. And if I'm not mistaken, one of the guys who found the Saxon Hoard did so with an old second hand detector he bought from a car boot sale.
That means, even if you had your little Tilswall TST-TCY-P over in the area where the Saxon Hoard was buried before it was found, and you were the lucky person who was in the right place at the right time, you more than likely would have found some of that treasure with the Tilswall TST-TCY-P.
