I love the full-zip borealis. So cheap for such a useful jacket. Sizing for good shoulder/chest fit was kind of wonky (I wear a L in Arcteryx, M in everything else, and an XL in the borealis to fit a light insulated layer underneath and still have good mobility). That and the non-helmet-optimized hood are my only complaints. It still fits over a helmet in a pinch, though - it's not as mobile as with the hood down but I've had gusty days where I get a few pitches in and realized I've had the hood over my helmet the whole time.
Great mobility (99% of why I bought it), great wind resistance, lightweight, nice chest pocket positioning, and decent rain resistance too - I'll probably top up the DWR coating once a year but it's replaced every other wind/rain/shell jacket I wear outside of winter.
The original Rab Boreas was a more breathable option and I preferred it over the newer/current Borealis; more of a standalone climbing layer, though and not as a jacket/softshell. The Borealis will block more wind/rain, though, for less breathability. https://www.gearexpress.com/rab-boreas-pull-on.html or ebay/poshmark/mercari for those who prefer the old ones. I liked the non-elasticized cuffs that would just push up for climbing, down when not.
I personally use Mountain Equipment Squall. Its expensive, but you can sometimes find good deals for it in the US. I think I bought mine for about $80 on sale a few years ago. Stuffs into its chest pocket and doesn't have any side pockets. The fit is athletic and not baggy. The hood is good for going over a helmet. I climb with it on granite cracks often and its still holding up well.