I have used TI flats for the past 10 years on all my basses - Precission, Jazz and a GB Rumour, (I don't think Bernie was impressed). It took me 20 years to find a string that i liked so much. The only way i can describe them is a beautiful consistent and mellow tone, actually improving once they are worn in a bit,
The best advice i can offer is to try them, you may just find as i did that you never want any other type of string. If they are not for you then offer me the set 2nd hand for a reasonable price!