Ryan Oakey wrote a review of La Sportiva Tarantulace Climbing Shoe on November 11, 2013
Familiarity: I've used it several times
Fit: Runs large
Size: I wear a size 41 street shoe (size 8.5 US). I normally wear a 40.5 in climbing shoes (size 8 US). I bought a 40.5 and found that it was a perfect fit for now but this shoe is unlined leather. This means it will stretch as you sweat and climb in them. I may go for a full size down.
Performance: Before you become to critical of the shoe it is important to note its purpose. I normally climb in Scarpa Instincts a far more aggressive and expensive shoe. It would be ridiculous to expect an $80 shoe to perform like a $150. The rubber is not particularly sticky though it does the job. It edges well, and has no baggy heel (normally a problem in most shoes for me). I bought the shoe because I wanted something that wouldn't hurt my feet when training in the gym or doing lite climbing with friends. It has done everything I wanted it to.
Recommendation: I would recommend this shoe to people buying their first pair of shoes. It is not a high performance shoe but does the job and is super cheap. I personally believe that unlined leather lace-ups are usually the best climbing shoes for fit and comfort. I would also recommend this shoe for people who need a comfortable gym shoe. I would not recommend this shoe for bouldering. It just isn't aggressive enough for bouldering.