They work. They fit. They are warm. Surf longer (if your arms are as good as the sujit!)
The great thing about the Finisterre wetsuits is they are clearly designed for British surfers (who don't like spending money and want a suit that lasts more than a season) and British waters. I bought the 3mm Yulex. It was a no brainer after having had a 4-3 since their launch. I've had two winter (4-3) suits. Sent them back recently for repair becasue th eneoprene is still good 4 years on! No other suit keep you as warm for as long over more than one season. Ive had a few.
Unless you really feel the cold the 4-3 is enough (just wish Finisterre would make one with a hood!)
Oh,...don't be put off by the tight squeeze in and out. It makes for fun in the car park