We use EFS on every laptop, and haven't seen any issues that are caused/related to the combination of products.
Recoveries can be more challenging, since the only tool I'm aware of to backup/copy EFS'd files is NTBackup. We use our own WinPE CD, w/ WinTech, NIC drivers, and NTBackup on it in order to recover data.
Repairs/Eboots still work fine w/ SafeTech CD.
Note: We only encrypt selected files/folders within each users profile, so most of the drive is not EFS encrypted.