Legal fees can stack up quickly when moving homes, so it’s worth keeping them down wherever you can. In the UK, some lenders will recommend a solicitor for you to use, but it isn't always worth going with their option.
In many cases they won't be local to you, meaning all communication will be done over email or the phone, which can lead to delays. Whatever you do, make sure that your solicitor is on the approved panel for your mortgage lenders, otherwise you'll have to pay extra to have them instructed.
If you live in the US, you may wish to approach an attorney to have them look over the title deeds and documents to ensure the paperwork you're thinking about signing is fair.