I found this shoe to fit my heel really well and like the sensitivity of the split outsole. Not a smearing shoe, but great for steep and overhangs. Best if fitted pretty snug.

Sized for an aggressive fit: .5 up from street size.
2 months of climbing in the gym and a bit outdoors. 1.5hr+ sessions for 5-6 days a week.
The good: Great for edging and smearing, which are it’s only redeeming qualities. Quick break in time. Perfect for about 2 weeks.
The bad: Shoe began to show a lot of wear and tear within a week or two of climbing. It never seems to stop stretching, which makes a snug fit impossible to get. The sole appeared to be peeling away from the shoe very quickly but it held up at a cost to a more roomier feel. There are a lot of spots in this shoe that are not snug: heel is the worst (absolutely terrifying to heel hook in these), top of the foot, and the arch area are also bad. My foot moves around in these a lot making them less of a performance shoe and therefore unreliable most of the time.
I would recommend getting your street shoe size in this and enduring a more painful break in. It could possibly bring a more desirable broken in climbing shoe. Or I would wait until some of the issues are resolved by So iLL in the future.
I will be switching to another brand at this point unfortunately.

The split sole is nice for a bit of flexibility, and the rubber is very sticky, but this shoe is pretty limited to steep overhanging routes requiring precise toes. It doesn’t smear very well (as expected), but I don’t love it for vertical or slightly overhanging climbs and edging. Prior to this shoe, I used the Scarpa Chimera which I’ve found to be much more versatile than the FR Pro. Also, I want to support small businesses, but find the quality to be less than that of Scarpa. The heel fits me better in the FR Pro than in the Chimera so my heel hooks feel more secure and powerful, but after following the sizing recommendations I still find the heel to be a bit baggy. With the stickiness of the rubber, and the heel fit of the FR Pro, I will probably try the New Zero Pro a half size smaller and hopefully that will be my new all around bouldering shoe. I’ve used this in the gym, and on SoCal granite.

This is a highly specialized shoe, and I would not recommend it for beginner, and lower level intermediate climbers. I think it’s best for higher level intermediate and advanced climbers looking for a shoe suited for hard cave and roofs problems.