I'm new to the rock climbing sport. (2 months).these shoes fit great and perfom great also. I couldn't believe the difference in my climbing after switching from the rentals. I know comparing to rentals isn't saying a whole lot but these shoes felt great. Great price for a great beginner shoe.
I got these shoes for my brother when he started climbing, and he likes them just fine. I chose these because they are really inexpensive for the brand, the rubber is stiff and sticky, and the shoe doesn't need much of a break in. I would say it is comprable to Evolv Defy in price and quality. The main difference is that the Defys have more sensitivity and is a bit more comfortable, but the Tarantulace has better edging and rubber. The shoe doesn't stretch too much, and the laces allow you to keep it tight, so I would say there is no need to downsize for this shoe.
I sized these shoes for comfort to learn trad (39, I wear a 38 in Katanas for performance). They're more comfortable than the Evolv Royales I started climbing in, but they're still not truly comfortable just because of the fairly cheap last (unless you've got really flat feet). Spend more on a better pair of shoes if you're already committed to rock climbing, even if you want comfort. I would have been better off with Mythos or just a larger pair of Katanas. They're still a great cheap way to start climbing.
I am a novice climber (2 months) and this is the first pair of rock shoes that i owned. but i have been very pleased with them so far. i have a pretty low volume heel, and this shoe is the most snug on my heel that i have tried out of nagos, evolv defy, and scarpa helix. it fits pretty comfortably. but it does stretch so be sure to buy them pretty tight. i wear size 10 street shoe and i bought 42.