I think its better to apply on your own.The guidance on how to fill up the form and the necessary documents you need are all in the VFS Website.
Basically, the solicitor will just help you in filling up the form and compiling the requirements which you can do on your own.
When you submit your application, solicitor wont be able to help you coz they only allow those visa applicant to get in.Aside from that they cannot help in the visa decision.It all depends on the proofs you will submit.
