I sold Cellhelmet at a Wireless Revolution store selling Cricket. They started carrying it vs getting new screen protectors (film or glass) for every single budget to mid range phone that came out because it was just cost effective for them. We had to take a class on how to apply it, and how the insurance tiers worked. I really didn't want to put it on my brand new iPhone X so I put it on my AW3 figuring it wouldn't hurt.
For scratch protection, which is what liquid glass is for, it worked perfectly. I wish I'd used some on my AW4. For crack protection, they straight up know it's not going to stop a break. However, they sell you the different tiers of insurance to cushion a screen replacement.
Is it a long convoluted process? Yes. Break phone. Get phone fixed through legitimate means. Pay for fix. Send receipt to Cellhelmet. Be reimbursed. It's about a 6 week process to be honest, and nobody got time for that. But if you have to pay more than $30], you're out those extra bucks.
If you're looking for scratch protection then Cellhelmet is for you. It's easy to apply, just a little patience needed. Are there better liquid glass options than Cellhelmet? Yes. But for an average user that doesn't break their screens or cause careless damage to their device then liquid glass might be a good choice for you.