I'm guessing that there are no reviews because, at that level, most people would get either the Rossa (L55+) or (if they wanted to spend the credits) the Sabertooth.
The Rossa has a great reputation and is pretty inexpensive. But if you're going to spend the extra credits that you would for the Spider, you're probably better off spending just a bit more and getting the Sabertooth.
If it were me, however, I wouldn't get any of them. You're not that far from Level 70. The Level 70 Versa is one of the best putters in the Pro Shop. I'd wait for that putter because you're not that far off.
That's just my 2 cents. Others may have a different opinion.
By the way, if you really want to improve your putting, invest in 3 high-quality wedges. That'll do more for you than a new putter would.