I trained in 1995 and thought Long Beach excellent but UKFT not to my satisfaction....but long time ago and much water under bridge...so no axe to grind.
I am now an FI in the UK and would recommend that you train in the UK because in the long run it is no cheaper going to the States to learn (unlike hour building). Reason for going to US is weather and experience. Weather at Long Beach can be foggy (due local sea fog) in the morning and hazzy (smog) every other time. So weather arguement runs a bit thin.
Doing PPL in a month means hard work, (exams to pass) and commitment. Similar commitment and continuity in the UK would cost something similar to PPL in USA, plus accomm, plus airfare plus retraining when you get back home etc. The real factor is confidence...it may take you ages to get confident with UK airspace and RT if you only have USA experience.
In case you think I am just trying to plead the case for expensive UK based FTOs, not so. But I do regular retraining of UK PPLs who have trained Stateside...RT and airspace really sets them back and generally they require an extra 5-10 hours to gain their confidence (...nothing wrong with their flying skills).
Some trainers in the US know that you will be given a club check ride before you use your licence in the UK, so it is not necessary for them to train you for any competence other than to pass the GFT. I certainly train my students to exceed the test standards...to be safe, confident and to use the licence to the full.
You pay your money and make your choice.