In our network we have activated Extended_UL_TBF in some urban cells. Regarding KPI, UL_TBF drop increased a bit, DL_TBF drop decreased, DL TBF establishment success is better. We did some data tests and Round Trip Time improved (decreased) e.g. pinging google from RTT=around 600 [ms] decreased to RTT=around 300 [ms]. The only drawback I saw is UL TBF Drop increasing, but not too much (from 3.5 % to 5 %) and DL_TBF drop improved (from around 4% to around 3%). Regarding additional parameters I don’t know. I would be grateful if somebody knows whether it’s needed any other parameter.